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HOWSTUFFWORKS.COM HowStuffWorks - Learn How Everything Works!

howstuffworks.com Website Information

Daily Unique Visits: 2,947,517

Daily Page Views: 23,580,136

Income Per Day: $23,580

Estimated Value: $25,466,400

This website is located in United States and is using following IP address 108.138.217.93. See the complete list of popular websites hosted in United States.

howstuffworks.com is registered under .COM top-level domain. Please check other sites in .COM zone.

Website howstuffworks.com is using the following name servers:

  • ns-1026.awsdns-00.org
  • ns-1723.awsdns-23.co.uk
  • ns-230.awsdns-28.com
  • ns-514.awsdns-00.net

and is probably hosted by AMAZON-02 - Amazon.com, Inc., US. See the full list of other websites hosted by AMAZON-02 - Amazon.com, Inc., US.

The highest website howstuffworks.com position in Alexa rank database was 479 and the lowest rank position was 522. Current position of howstuffworks.com in Alexa rank database is 517.

Desktop speed score of howstuffworks.com (84/100) is better than the results of 78.07% of other sites and shows that the page is performing great on desktop computers.

Mobile usability score of howstuffworks.com (99/100) is better than the results of 79.46% of other sites and means that the page is mobile-friendly.

Mobile speed score of howstuffworks.com (61/100) is better than the results of 57.04% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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howstuffworks.com Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

howstuffworks.com whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.

Domain Name: HOWSTUFFWORKS.COM
Registry Domain ID: 1568263_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.enom.com
Registrar URL: http://www.enomdomains.com
Updated Date: 2024-06-11T06:24:04Z
Creation Date: 1998-07-11T04:00:00Z
Registry Expiry Date: 2025-07-10T04:00:00Z
Registrar: eNom, LLC
Registrar IANA ID: 48
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS-1026.AWSDNS-00.ORG
Name Server: NS-1723.AWSDNS-23.CO.UK
Name Server: NS-230.AWSDNS-28.COM
Name Server: NS-514.AWSDNS-00.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-09-09T11:16:54Z

howstuffworks.com server information

Servers Location

howstuffworks.com desktop page speed rank

Last tested: 2016-06-12

Desktop Speed Medium
84/100

howstuffworks.com Desktop Speed Test Quick Summary


priority - 9Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

http://assets.hswstatic.com/lite/296/css/landing-page.min.css (expiration not specified)
http://assets.hswstatic.com/lite/296/js/base.min.js (expiration not specified)
http://assets.hswstatic.com/lite/296/js/hsw.ads.js (expiration not specified)
http://assets.hswstatic.com/lite/fonts/ss-social-circle.woff (expiration not specified)
http://cdn.now.howstuffworks.com/media-content/29b…5608f8977-1210-680.jpg (expiration not specified)
http://cdn.now.howstuffworks.com/media-content/64f…ffe08cb53-1210-680.jpg (expiration not specified)
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http://www.googletagservices.com/tag/js/gpt.js (15 minutes)
http://www.googletagmanager.com/gtm.js?id=GTM-NXHP8V (16.2 minutes)
http://connect.facebook.net/en_US/fbevents.js (20 minutes)
http://hsw-d.openx.net/w/1.0/jstag (60 minutes)
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http://www.google-analytics.com/analytics.js (2 hours)

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://assets.hswstatic.com/lite/296/js/base.min.js
http://assets.hswstatic.com/lite/296/js/hsw.ads.js
http://s.hswstatic.com/ddm/javascript/apis/4.0.9/dist/prebid.min.js

Optimize CSS Delivery of the following:

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priority - 0Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 1.9KiB (22% reduction).

Losslessly compressing http://s.hswstatic.com/gif/hsw_home_logo.png could save 1.1KiB (19% reduction).
Losslessly compressing http://s.hswstatic.com/en-us/hsw/img/logo.png could save 770B (30% reduction).

priority - 0Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 1.7KiB (43% reduction).

Minifying http://assets.hswstatic.com/lite/296/js/hsw.ads.js could save 1.7KiB (43% reduction) after compression.

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

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howstuffworks.com Desktop Resource Breakdown

Total Resources131
Number of Hosts61
Static Resources39
JavaScript Resources35
CSS Resources4

howstuffworks.com mobile page speed rank

Last tested: 2019-12-02

Mobile Speed Bad
61/100

howstuffworks.com Mobile Speed Test Quick Summary


priority - 48Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://cdn-assets.hswstatic.com/lite/2254/js/base.2.0.min.js

Optimize CSS Delivery of the following:

https://cdn-assets.hswstatic.com/lite/2254/css/landing.min.css

priority - 11Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://cdn.hswstatic.com/en-us/hsw/img/header-logo-hsw.svg (expiration not specified)
https://cdn.hswstatic.com/en-us/hsw/img/playlist-pause.png (expiration not specified)
https://cdn.hswstatic.com/en-us/hsw/img/playlist-play.png (expiration not specified)
https://d1bk6lwzdwelz0.cloudfront.net/script.js (expiration not specified)
https://d5p.de17a.com/getuid/indexexchange (expiration not specified)
https://cdn.stuff.com/glogger/glogger.js (15 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-NXHP8V (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/161682…0123?v=2.9.14&r=stable (20 minutes)
https://s.flocdn.com/@s1/omjs/omjs-3.js (30 minutes)
https://s.flocdn.com/@s1/protobuf/protobuf-0.js (30 minutes)
https://js-sec.indexww.com/ht/htw-pixel.gif?XeSi69HM4MoAAH8ZZn8AAABj%26248 (38.2 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
https://c2.taboola.com/nr/howstuffworks-howstuffworks/newsroom.js (4 hours)
https://cdn.taboola.com/libtrc/howstuffworks-howstuffworks/loader.js (4 hours)
https://cdn.taboola.com/libtrc/impl.20191120-26_b3…987e4f-SNAPSHOT.es5.js (4 hours)
https://ads.pubmatic.com/AdServer/js/user_sync.html?p=156578&predirect= (5.9 hours)

priority - 7Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 68.4KiB (28% reduction).

Compressing https://resize.hswstatic.com/h_300/gif/humans-eat-grass.jpg could save 20.3KiB (31% reduction).
Compressing https://resize.hswstatic.com/h_300/gif/college.jpg could save 12.7KiB (32% reduction).
Compressing https://resize.hswstatic.com/h_300/gif/gorillas.jpg could save 9.8KiB (20% reduction).
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Compressing https://resize.hswstatic.com/h_300/gif/white-sands-1.jpg could save 4KiB (18% reduction).

priority - 1Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 11KiB (79% reduction).

Compressing https://image6.pubmatic.com/AdServer/PugMaster?kdn…=0&gdpr_consent=&sec=1 could save 6.8KiB (78% reduction).
Compressing https://image2.pubmatic.com/AdServer/Pug?vcode=bz0…4525-9f93-86fd9f2e28d7 could save 1.5KiB (97% reduction).
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Compressing https://us-u.openx.net/w/1.0/cm?cc=1&id=dc2068a3-f…D&gdpr=0&gdpr_consent= could save 335B (42% reduction).

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 3KiB (99% reduction).

Minifying https://image2.pubmatic.com/AdServer/Pug?vcode=bz0…4525-9f93-86fd9f2e28d7 could save 1.5KiB (99% reduction).
Minifying https://simage2.pubmatic.com/AdServer/Pug?vcode=bz…sYw5SMLQenG&pid=557219 could save 1.5KiB (99% reduction).

howstuffworks.com Mobile Resource Breakdown

Total Resources245
Number of Hosts93
Static Resources31
JavaScript Resources20
CSS Resources1

howstuffworks.com mobile page usability

Last tested: 2019-12-02

Mobile Usability Good
99/100

howstuffworks.com Mobile Usability Test Quick Summary


priority - 1Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <a href="//www.howstuffworks.com" class="pull-left"></a> is close to 1 other tap targets.

The tap target <a href="//www.howstuffworks.com" class="pull-left"></a> is close to 1 other tap targets.

The tap target <a href="https://www.ho…/about-hsw.htm">About</a> and 4 others are close to other tap targets.
The tap target <a href="//www.howstuff…s.com/jobs.htm">Careers</a> and 3 others are close to other tap targets.

howstuffworks.com HTML validation

Errors

Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.

Line: 72 Column: 2 - 50
"...le=1" /> <meta http-equiv="content-language" content="en"> <!--..."

Duplicate attribute “class”.

Line: 611 Column: - 38
"... href="#" class="dropdown-togg..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 749 Column: 121 - 203
"...m="Image"><img class="d-block" src="https://resize.hswstatic.com/h_300/gif/obituary-1.jpg" /></a> ..." Line: 763 Column: 106 - 201
"...m="Image"><img class="d-block" src="https://resize.hswstatic.com/h_300/gif/what-talking-about-quiz.jpg" /></a> ..." Line: 777 Column: 131 - 224
"...m="Image"><img class="d-block" src="https://resize.hswstatic.com/h_300/gif/star-trails-night-sky.jpg" /></a> ..." Line: 791 Column: 103 - 182
"...m="Image"><img class="d-block" src="https://resize.hswstatic.com/h_300/gif/proteus.jpg" /></a> ..." Line: 805 Column: 108 - 196
"...m="Image"><img class="d-block" src="https://resize.hswstatic.com/h_300/gif/butterfly-effect.jpg" /></a> ..." Line: 819 Column: 103 - 188
"...m="Image"><img class="d-block" src="https://resize.hswstatic.com/h_300/gif/hamster-alone.jpg" /></a> ..." Line: 894 Column: 2 - 486
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/rose-garden.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/rose-garden.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/rose-garden.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/rose-garden.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/rose-garden.jpg 700w" class="lazyload " /> ..." Line: 919 Column: 2 - 506
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/marshall-plan-6.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/marshall-plan-6.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/marshall-plan-6.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/marshall-plan-6.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/marshall-plan-6.jpg 700w" class="lazyload " /> ..." Line: 961 Column: 2 - 526
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/outrun-t-rex-orig-1.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/outrun-t-rex-orig-1.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/outrun-t-rex-orig-1.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/outrun-t-rex-orig-1.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/outrun-t-rex-orig-1.jpg 700w" class="lazyload " /> ..." Line: 981 Column: 2 - 496
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/triceratops-3.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/triceratops-3.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/triceratops-3.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/triceratops-3.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/triceratops-3.jpg 700w" class="lazyload " /> ..." Line: 1001 Column: 2 - 476
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/dino-skel.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/dino-skel.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/dino-skel.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/dino-skel.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/dino-skel.jpg 700w" class="lazyload " /> ..." Line: 1021 Column: 2 - 501
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/giganatosaurus.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/giganatosaurus.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/giganatosaurus.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/giganatosaurus.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/giganatosaurus.jpg 700w" class="lazyload " /> ..." Line: 1041 Column: 2 - 511
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/dinosaurtracks-4.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/dinosaurtracks-4.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/dinosaurtracks-4.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/dinosaurtracks-4.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/dinosaurtracks-4.jpg 700w" class="lazyload " /> ..." Line: 1061 Column: 2 - 496
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/Stegosaurus-1.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/Stegosaurus-1.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/Stegosaurus-1.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/Stegosaurus-1.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/Stegosaurus-1.jpg 700w" class="lazyload " /> ..." Line: 1104 Column: 2 - 481
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/shangri-la.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/shangri-la.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/shangri-la.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/shangri-la.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/shangri-la.jpg 700w" class="lazyload " /> ..." Line: 1124 Column: 2 - 531
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/iroquois-constiution.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/iroquois-constiution.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/iroquois-constiution.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/iroquois-constiution.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/iroquois-constiution.jpg 700w" class="lazyload " /> ..." Line: 1144 Column: 2 - 481
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/nazis-ufos.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/nazis-ufos.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/nazis-ufos.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/nazis-ufos.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/nazis-ufos.jpg 700w" class="lazyload " /> ..." Line: 1164 Column: 2 - 541
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/plymouth-rock-beer-new.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/plymouth-rock-beer-new.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/plymouth-rock-beer-new.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/plymouth-rock-beer-new.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/plymouth-rock-beer-new.jpg 700w" class="lazyload " /> ..." Line: 1204 Column: 2 - 737
"... <img src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/10-outrageous-experiments-conducted-on-humans.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/10-outrageous-experiments-conducted-on-humans.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/10-outrageous-experiments-conducted-on-humans.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/10-outrageous-experiments-conducted-on-humans.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/10-outrageous-experiments-conducted-on-humans.jpg 700w" class="lazyload " /> ..." Line: 1236 Column: 2 - 401
"... <img src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="sizes="(max-width: 235px) 235px, 200px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/camera-flash-intro.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_235/h_133/gif/camera-flash-intro.jpg 235w, https://resize.hswstatic.com/w_200/h_112.5/gif/camera-flash-intro.jpg 200w" class="lazyload " /> ..." Line: 1268 Column: 2 - 419
"... <img src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="sizes="(max-width: 320px) 320px, 360px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/chocolate-bad-for-skin-1.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/chocolate-bad-for-skin-1.jpg 320w, https://resize.hswstatic.com/w_360/h_202.5/gif/chocolate-bad-for-skin-1.jpg 360w" class="lazyload " /> ..." Line: 1311 Column: 118 - 223
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/butterfly-effect.jpg" class="lazyload mb-2" /></a> ..." Line: 1314 Column: 99 - 201
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/androgynous-2.jpg" class="lazyload mb-2" /></a> ..." Line: 1317 Column: 112 - 210
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/rose-love.jpg" class="lazyload mb-2" /></a> ..." Line: 1320 Column: 116 - 219
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/bessie-coleman.jpg" class="lazyload mb-2" /></a> ..." Line: 1324 Column: 129 - 228
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/foxglove-1.jpg" class="lazyload mb-2" /></a> ..." Line: 1327 Column: 138 - 239
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/Buffalo-bill.jpg" class="lazyload mb-2" /></a> ..." Line: 1330 Column: 109 - 208
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/continents.jpg" class="lazyload mb-2" /></a> ..." Line: 1333 Column: 120 - 219
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/sunflowers.jpg" class="lazyload mb-2" /></a> ..."

Element “img” is missing required attribute “src”.

Line: 894 Column: 2 - 486
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/rose-garden.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/rose-garden.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/rose-garden.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/rose-garden.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/rose-garden.jpg 700w" class="lazyload " /> ..." Line: 919 Column: 2 - 506
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/marshall-plan-6.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/marshall-plan-6.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/marshall-plan-6.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/marshall-plan-6.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/marshall-plan-6.jpg 700w" class="lazyload " /> ..." Line: 961 Column: 2 - 526
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/outrun-t-rex-orig-1.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/outrun-t-rex-orig-1.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/outrun-t-rex-orig-1.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/outrun-t-rex-orig-1.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/outrun-t-rex-orig-1.jpg 700w" class="lazyload " /> ..." Line: 981 Column: 2 - 496
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/triceratops-3.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/triceratops-3.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/triceratops-3.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/triceratops-3.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/triceratops-3.jpg 700w" class="lazyload " /> ..." Line: 1001 Column: 2 - 476
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/dino-skel.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/dino-skel.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/dino-skel.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/dino-skel.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/dino-skel.jpg 700w" class="lazyload " /> ..." Line: 1021 Column: 2 - 501
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/giganatosaurus.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/giganatosaurus.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/giganatosaurus.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/giganatosaurus.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/giganatosaurus.jpg 700w" class="lazyload " /> ..." Line: 1041 Column: 2 - 511
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/dinosaurtracks-4.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/dinosaurtracks-4.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/dinosaurtracks-4.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/dinosaurtracks-4.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/dinosaurtracks-4.jpg 700w" class="lazyload " /> ..." Line: 1061 Column: 2 - 496
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/Stegosaurus-1.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/Stegosaurus-1.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/Stegosaurus-1.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/Stegosaurus-1.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/Stegosaurus-1.jpg 700w" class="lazyload " /> ..." Line: 1104 Column: 2 - 481
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/shangri-la.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/shangri-la.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/shangri-la.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/shangri-la.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/shangri-la.jpg 700w" class="lazyload " /> ..." Line: 1124 Column: 2 - 531
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/iroquois-constiution.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/iroquois-constiution.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/iroquois-constiution.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/iroquois-constiution.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/iroquois-constiution.jpg 700w" class="lazyload " /> ..." Line: 1144 Column: 2 - 481
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/nazis-ufos.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/nazis-ufos.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/nazis-ufos.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/nazis-ufos.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/nazis-ufos.jpg 700w" class="lazyload " /> ..." Line: 1164 Column: 2 - 541
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/plymouth-rock-beer-new.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/plymouth-rock-beer-new.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/plymouth-rock-beer-new.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/plymouth-rock-beer-new.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/plymouth-rock-beer-new.jpg 700w" class="lazyload " /> ..." Line: 1311 Column: 118 - 223
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/butterfly-effect.jpg" class="lazyload mb-2" /></a> ..." Line: 1314 Column: 99 - 201
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/androgynous-2.jpg" class="lazyload mb-2" /></a> ..." Line: 1317 Column: 112 - 210
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/rose-love.jpg" class="lazyload mb-2" /></a> ..." Line: 1320 Column: 116 - 219
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/bessie-coleman.jpg" class="lazyload mb-2" /></a> ..." Line: 1324 Column: 129 - 228
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/foxglove-1.jpg" class="lazyload mb-2" /></a> ..." Line: 1327 Column: 138 - 239
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/Buffalo-bill.jpg" class="lazyload mb-2" /></a> ..." Line: 1330 Column: 109 - 208
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/continents.jpg" class="lazyload mb-2" /></a> ..." Line: 1333 Column: 120 - 219
"...nofollow"><img data-src="https://resize.hswstatic.com/w_400/h_225/gif/sunflowers.jpg" class="lazyload mb-2" /></a> ..."

The “sizes” attribute may be specified only if the “srcset” attribute is also present.

Line: 894 Column: 2 - 486
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/rose-garden.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/rose-garden.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/rose-garden.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/rose-garden.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/rose-garden.jpg 700w" class="lazyload " /> ..." Line: 919 Column: 2 - 506
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/marshall-plan-6.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/marshall-plan-6.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/marshall-plan-6.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/marshall-plan-6.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/marshall-plan-6.jpg 700w" class="lazyload " /> ..." Line: 961 Column: 2 - 526
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/outrun-t-rex-orig-1.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/outrun-t-rex-orig-1.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/outrun-t-rex-orig-1.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/outrun-t-rex-orig-1.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/outrun-t-rex-orig-1.jpg 700w" class="lazyload " /> ..." Line: 981 Column: 2 - 496
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/triceratops-3.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/triceratops-3.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/triceratops-3.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/triceratops-3.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/triceratops-3.jpg 700w" class="lazyload " /> ..." Line: 1001 Column: 2 - 476
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/dino-skel.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/dino-skel.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/dino-skel.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/dino-skel.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/dino-skel.jpg 700w" class="lazyload " /> ..." Line: 1021 Column: 2 - 501
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/giganatosaurus.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/giganatosaurus.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/giganatosaurus.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/giganatosaurus.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/giganatosaurus.jpg 700w" class="lazyload " /> ..." Line: 1041 Column: 2 - 511
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/dinosaurtracks-4.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/dinosaurtracks-4.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/dinosaurtracks-4.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/dinosaurtracks-4.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/dinosaurtracks-4.jpg 700w" class="lazyload " /> ..." Line: 1061 Column: 2 - 496
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/Stegosaurus-1.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/Stegosaurus-1.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/Stegosaurus-1.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/Stegosaurus-1.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/Stegosaurus-1.jpg 700w" class="lazyload " /> ..." Line: 1104 Column: 2 - 481
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/shangri-la.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/shangri-la.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/shangri-la.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/shangri-la.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/shangri-la.jpg 700w" class="lazyload " /> ..." Line: 1124 Column: 2 - 531
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/iroquois-constiution.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/iroquois-constiution.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/iroquois-constiution.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/iroquois-constiution.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/iroquois-constiution.jpg 700w" class="lazyload " /> ..." Line: 1144 Column: 2 - 481
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/nazis-ufos.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/nazis-ufos.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/nazis-ufos.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/nazis-ufos.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/nazis-ufos.jpg 700w" class="lazyload " /> ..." Line: 1164 Column: 2 - 541
"... <img sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/plymouth-rock-beer-new.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/plymouth-rock-beer-new.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/plymouth-rock-beer-new.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/plymouth-rock-beer-new.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/plymouth-rock-beer-new.jpg 700w" class="lazyload " /> ..." Line: 1204 Column: 2 - 737
"... <img src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="sizes="(max-width: 320px) 320px, (max-width: 420px) 420px, (max-width: 660px) 660px, 700px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/10-outrageous-experiments-conducted-on-humans.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/10-outrageous-experiments-conducted-on-humans.jpg 320w, https://resize.hswstatic.com/w_420/h_236/gif/10-outrageous-experiments-conducted-on-humans.jpg 420w, https://resize.hswstatic.com/w_640/h_360/gif/10-outrageous-experiments-conducted-on-humans.jpg 640w, https://resize.hswstatic.com/w_700/h_393.75/gif/10-outrageous-experiments-conducted-on-humans.jpg 700w" class="lazyload " /> ..." Line: 1236 Column: 2 - 401
"... <img src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="sizes="(max-width: 235px) 235px, 200px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/camera-flash-intro.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_235/h_133/gif/camera-flash-intro.jpg 235w, https://resize.hswstatic.com/w_200/h_112.5/gif/camera-flash-intro.jpg 200w" class="lazyload " /> ..." Line: 1268 Column: 2 - 419
"... <img src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="sizes="(max-width: 320px) 320px, 360px" data-src="https://resize.hswstatic.com/w_510/h_286/gif/chocolate-bad-for-skin-1.jpg" width="510" data-srcset="https://resize.hswstatic.com/w_320/h_180/gif/chocolate-bad-for-skin-1.jpg 320w, https://resize.hswstatic.com/w_360/h_202.5/gif/chocolate-bad-for-skin-1.jpg 360w" class="lazyload " /> ..."

No space between attributes.

Line: 1204 Column: - 88
"...EAAAICTAEAOw=="sizes="(max-wid..." Line: 1236 Column: - 88
"...EAAAICTAEAOw=="sizes="(max-wid..." Line: 1268 Column: - 88
"...EAAAICTAEAOw=="sizes="(max-wid..."

Warnings

The “type” attribute is unnecessary for JavaScript resources.

Line: 669 Column: 1 - 31
"...header> <script type="text/javascript"> $(doc..." Line: 1516 Column: 11 - 41
"... </script><script type="text/javascript"> if (..."

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

Line: 1295 Column: 4 - 221
"...orks"> <img class="d-none d-lg-block mx-auto" src="//cdn.hswstatic.com/en-us/hsw/img/banner-fb-like-728x90.png" alt="Like HowStuffWorks on Facebook" title="Like HowStuffWorks on Facebook" border="0" width="728" height="90" /> <i..." Line: 1296 Column: 4 - 215
"...90" /> <img class="d-lg-none mx-auto" src="//cdn.hswstatic.com/en-us/hsw/img/banner-fb-like-300x250.png" alt="Like HowStuffWorks on Facebook" title="Like HowStuffWorks on Facebook" border="0" width="300" height="250" /> </a..."

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