exploratorium.edu Website Information

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Daily Page Views: 3,871,368

Income Per Day: $3,871

Estimated Value: $4,180,680

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The highest website exploratorium.edu position in Alexa rank database was 2996 and the lowest rank position was 3240. Current position of exploratorium.edu in Alexa rank database is 3149.

Desktop speed score of exploratorium.edu (41/100) is better than the results of 15.65% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of exploratorium.edu (98/100) is better than the results of 55.61% of other sites and means that the page is mobile-friendly.

Mobile speed score of exploratorium.edu (32/100) is better than the results of 11.35% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

exploratorium.edu Alexa Rank

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-------------------------------------------------------------

Domain Name: EXPLORATORIUM.EDU

Registrant:
The Exploratorium
Pier 15/17
The Embarcadero
San Francisco, CA 94111
USA

Administrative Contact:
Ron Hipschman
The Exploratorium
Pier 15/17
The Embarcadero
San Francisco, CA 94111
USA
+1.4158713736
ronh@exploratorium.edu

Technical Contact:
Ron Hipschman
The Exploratorium
Pier 15/17
The Embarcadero
San Francisco, CA 94111
USA
+1.4158713736
ronh@exploratorium.edu

Name Servers:
NS-1127.AWSDNS-12.ORG
NS-1733.AWSDNS-24.CO.UK
NS-415.AWSDNS-51.COM
NS-797.AWSDNS-35.NET

Domain record activated: 28-May-1992
Domain record last updated: 26-Aug-2024
Domain expires: 31-Jul-2027

exploratorium.edu server information

Servers Location

exploratorium.edu desktop page speed rank

Last tested: 2019-12-08

Desktop Speed Bad

41/100

exploratorium.edu Desktop Speed Test Quick Summary

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priority - 9Avoid landing page redirects

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

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

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priority - 4Leverage browser caching

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exploratorium.edu Desktop Resource Breakdown

Total Resources	124
Number of Hosts	30
Static Resources	84
JavaScript Resources	53
CSS Resources	8

exploratorium.edu mobile page speed rank

Last tested: 2018-10-09

Mobile Speed Bad

32/100

exploratorium.edu Mobile Speed Test Quick Summary

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

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priority - 34Avoid landing page redirects

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priority - 10Minify JavaScript

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

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priority - 7Leverage 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.

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priority - 1Enable compression

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priority - 0Minify CSS

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exploratorium.edu Mobile Resource Breakdown

Total Resources	125
Number of Hosts	30
Static Resources	85
JavaScript Resources	53
CSS Resources	8

exploratorium.edu mobile page usability

Last tested: 2018-10-09

Mobile Usability Good

98/100

exploratorium.edu Mobile Usability Test Quick Summary

priority - 2Size 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="#" class="sf-accordion-button">+</a> is close to 5 other tap targets.

The tap target <a href="#" class="sf-accordion-button">+</a> and 6 others are close to other tap targets.

The tap target <a href="/visit" class="sf-depth-1 menuparent">visit</a> and 3 others are close to other tap targets.

The tap target <a href="/visit"></a> and 4 others are close to other tap targets.

The tap target <a href="https://www.ex…rium.edu/visit">Visit us</a> and 5 others are close to other tap targets.

The tap target <a href="/visit/location-directions">Pier 15 (Embar…isco, CA 94111</a> is close to 1 other tap targets.

exploratorium.edu HTML validation

Errors

Legacy doctype. Expected “<!DOCTYPE html>”.

Line: 2 Column: 1 - 50
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd"> <html..."

Attribute “xmlns:og” not allowed here.

Line: 17 Column: 51 - 48
"...fa-1.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" version="XHTML+RDFa 1.0" dir="ltr" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#"> <hea..."

Attribute “xmlns:article” not allowed here.

Attribute “xmlns:book” not allowed here.

Attribute “xmlns:profile” not allowed here.

Attribute “xmlns:video” not allowed here.

Attribute “xmlns:product” not allowed here.

Attribute “xmlns:content” not allowed here.

Attribute “xmlns:dc” not allowed here.

Attribute “xmlns:foaf” not allowed here.

Attribute “xmlns:rdfs” not allowed here.

Attribute “xmlns:sioc” not allowed here.

Attribute “xmlns:sioct” not allowed here.

Attribute “xmlns:skos” not allowed here.

Attribute “xmlns:xsd” not allowed here.

When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.

The “version” attribute on the “html” element is obsolete. You can safely omit it.

The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.

Line: 19 Column: 49 - 51
"...LSchema#"> <head profile="http://www.w3.org/1999/xhtml/vocab"> <me..."

Bad value “140px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.

Line: 121 Column: 41 - 114
"... href="/"><img src="/sites/default/files/site/explo-logo-black.svg" width="140px" /></a></..."

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

Line: 121 Column: 41 - 114
"... href="/"><img src="/sites/default/files/site/explo-logo-black.svg" width="140px" /></a></..." Line: 165 Column: 13 - 70
"... <img src="/sites/default/files/site/explo-logo-black.svg"> ..." Line: 220 Column: 209 - 317
"...='/visit'><img src="https://www.exploratorium.edu/sites/default/files/feature_slides/IlluminatedFog_DSC_7185_GL.jpg" /></a></..." Line: 231 Column: 129 - 236
"...ducation'><img src="https://www.exploratorium.edu/sites/default/files/feature_slides/2_AfterDark_DSC_2146_GLcr.jpg" /></a></..." Line: 238 Column: 108 - 225
"...ia_slide'><img src="https://www.exploratorium.edu/sites/default/files/feature_slides/climate-change-at-explo-temp-banner.jpg" /></div>..." Line: 245 Column: 126 - 218
"...'/snacks'><img src="https://www.exploratorium.edu/sites/default/files/feature_slides/new_banner.jpg" /></a></..." Line: 252 Column: 144 - 254
"...fterdark'><img src="https://www.exploratorium.edu/sites/default/files/feature_slides/AD_WebBanner_CollinsTimeWarp.jpg" /></a></..." Line: 324 Column: 6 - 148
"...er"> <img src="https://www.exploratorium.edu/sites/default/files/styles/pod_small_wide_260_x_146/public/calendar/Promo%20Image.JPG?itok=nq85Lh2W" /> ..." Line: 357 Column: 6 - 146
"...er"> <img src="https://www.exploratorium.edu/sites/default/files/styles/pod_small_wide_260_x_146/public/calendar/ad-pod-time.jpg?itok=61Wx-N76" /> <..." Line: 357 Column: 152 - 272
"...6" /> <img class="overlay" src="https://www.exploratorium.edu/sites/all/themes/explo_main_site/images/afterdark-overlay.png" /> </..." Line: 391 Column: 6 - 151
"...er"> <img src="https://www.exploratorium.edu/sites/default/files/styles/pod_small_wide_260_x_146/public/calendar/LED_DSC_1613_pod.jpg?itok=fR8zl04D" /> ..." Line: 424 Column: 6 - 153
"...er"> <img src="https://www.exploratorium.edu/sites/default/files/styles/pod_small_wide_260_x_146/public/calendar/ROOFTOPSHARPEN_pod.jpg?itok=f9KcqxIn" /> ..." Line: 537 Column: 22 - 159
".../climate"><img src="https://www.exploratorium.edu/sites/default/files/styles/pod_small_wide_260_x_146/public/pages/NASA-Clouds.jpg?itok=I53dJx5G" /></a> ..." Line: 554 Column: 21 - 156
"..."/snacks"><img src="https://www.exploratorium.edu/sites/default/files/styles/pod_small_wide_260_x_146/public/pages/snackspod.jpg?itok=Mnh5ovO-" /></a> ..." Line: 568 Column: 42 - 183
"...-station"><img src="https://www.exploratorium.edu/sites/default/files/styles/pod_small_wide_260_x_146/public/pages/wired_pier_pod1.jpg?itok=IHyUBPA7" /></a> ..." Line: 581 Column: 78 - 206
"...t="_self"><img src="https://www.exploratorium.edu/sites/default/files/styles/pod_small_wide_260_x_146/public/baseball.jpg?itok=4vDij6UP" /></a> ..." Line: 614 Column: 17 - 94
"... href="/"><img src="/sites/default/files/site/explo-logo-black.svg" class="footer-logo"></a> ..."

Duplicate ID “search-block-form”.

Line: 178 Column: 5 - 115
"...ent"> <form class="search-form" role="search" action="/" method="post" id="search-block-form" accept-charset="UTF-8"><div><..."

Duplicate ID “edit-search-block-form--2”.

Line: 181 Column: 3 - 219
"...-form"> <input title="Enter the terms you wish to search for." class="custom-search-box form-text" placeholder="Search" type="text" id="edit-search-block-form--2" name="search_block_form" value="" size="15" maxlength="128" /> </div..."

Duplicate ID “edit-actions”.

Line: 183 Column: 1 - 57
".../> </div> <div class="form-actions form-wrapper" id="edit-actions"><input..."

Duplicate ID “edit-submit”.

Line: 183 Column: 58 - 142
"...-actions"><input type="submit" id="edit-submit" name="op" value="Search" class="form-submit" /></div>..."

Duplicate ID “superfish-2”.

Line: 199 Column: 5 - 88
"...ent"> <ul id="superfish-2" class="menu sf-menu sf-main-menu sf-horizontal sf-style-none"><li id..."

Duplicate ID “menu-910-2”.

Line: 199 Column: 89 - 144
"...yle-none"><li id="menu-910-2" class="first sf-depth-1 menuparent"><a hre..."

Duplicate ID “menu-2260-2”.

Line: 199 Column: 205 - 265
"...it</a><ul><li id="menu-2260-2" class="first sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1725-2”.

Line: 199 Column: 330 - 391
"...s</a></li><li id="menu-1725-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1726-2”.

Line: 199 Column: 479 - 540
"...g</a></li><li id="menu-1726-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-5143-2”.

Line: 199 Column: 603 - 664
"...r</a></li><li id="menu-5143-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1727-2”.

Line: 199 Column: 759 - 820
"...s</a></li><li id="menu-1727-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1729-2”.

Line: 199 Column: 892 - 953
"...s</a></li><li id="menu-1729-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-5144-2”.

Line: 199 Column: 1029 - 1088
"...s</a></li><li id="menu-5144-2" class="last sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-911-2”.

Line: 199 Column: 1164 - 1220
"...</ul></li><li id="menu-911-2" class="middle sf-depth-1 menuparent"><a hre..."

Duplicate ID “menu-2323-2”.

Line: 199 Column: 1285 - 1345
"...re</a><ul><li id="menu-2323-2" class="first sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1734-2”.

Line: 199 Column: 1423 - 1484
"...s</a></li><li id="menu-1734-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1733-2”.

Line: 199 Column: 1541 - 1602
"...s</a></li><li id="menu-1733-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1732-2”.

Line: 199 Column: 1661 - 1722
"...s</a></li><li id="menu-1732-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-2324-2”.

Line: 199 Column: 1809 - 1868
"...s</a></li><li id="menu-2324-2" class="last sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-912-2”.

Line: 199 Column: 1952 - 2008
"...</ul></li><li id="menu-912-2" class="middle sf-depth-1 menuparent"><a hre..."

Duplicate ID “menu-1737-2”.

Line: 199 Column: 2077 - 2137
"...on</a><ul><li id="menu-1737-2" class="first sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-2439-2”.

Line: 199 Column: 2248 - 2309
"...s</a></li><li id="menu-2439-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1735-2”.

Line: 199 Column: 2422 - 2483
"...g</a></li><li id="menu-1735-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1736-2”.

Line: 199 Column: 2590 - 2649
"...s</a></li><li id="menu-1736-2" class="last sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-913-2”.

Line: 199 Column: 2783 - 2839
"...</ul></li><li id="menu-913-2" class="middle sf-depth-1 menuparent"><a hre..."

Duplicate ID “menu-1740-2”.

Line: 199 Column: 2918 - 2978
"...ns</a><ul><li id="menu-1740-2" class="first sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1744-2”.

Line: 199 Column: 3080 - 3141
"...h</a></li><li id="menu-1744-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1743-2”.

Line: 199 Column: 3248 - 3309
"...s</a></li><li id="menu-1743-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-3136-2”.

Line: 199 Column: 3432 - 3493
"...s</a></li><li id="menu-3136-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1741-2”.

Line: 199 Column: 3580 - 3639
"...s</a></li><li id="menu-1741-2" class="last sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1457-2”.

Line: 199 Column: 3724 - 3781
"...</ul></li><li id="menu-1457-2" class="middle sf-depth-1 menuparent"><a hre..."

Duplicate ID “menu-1745-2”.

Line: 199 Column: 3859 - 3919
"...ve</a><ul><li id="menu-1745-2" class="first sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1746-2”.

Line: 199 Column: 3980 - 4041
"...p</a></li><li id="menu-1746-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-2317-2”.

Line: 199 Column: 4130 - 4191
"...d</a></li><li id="menu-2317-2" class="middle sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1748-2”.

Line: 199 Column: 4272 - 4331
"...e</a></li><li id="menu-1748-2" class="last sf-depth-2 sf-no-children"><a hre..."

Duplicate ID “menu-1696-2”.

Line: 199 Column: 4409 - 4453
"...</ul></li><li id="menu-1696-2" class="last sf-depth-1"><a hre..."

Attribute “content” not allowed on element “span” at this point.

Line: 317 Column: 3 - 162
"...rfix'> <span property="dc:title" content="Foundation for the Future: Reducing Earthquake and Flood Risk along the Embarcadero Seawall" class="rdf-meta element-hidden"></span..." Line: 317 Column: 170 - 270
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 350 Column: 3 - 111
"...ence'> <span property="dc:title" content="After Dark: Thursday, September 27, 2018" class="rdf-meta element-hidden"></span..." Line: 350 Column: 119 - 219
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 384 Column: 3 - 119
"...rfix'> <span property="dc:title" content="Latino Engineering Day/Día de la Ingeniería 2018" class="rdf-meta element-hidden"></span..." Line: 384 Column: 127 - 227
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 417 Column: 3 - 109
"...rfix'> <span property="dc:title" content="Mutual Air Kickoff and Listening Party" class="rdf-meta element-hidden"></span..." Line: 417 Column: 117 - 217
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 484 Column: 5 - 111
"...don'> <span property="dc:title" content="Media Object: Single-Serving Volcanism" class="rdf-meta element-hidden"></span..." Line: 484 Column: 119 - 219
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 533 Column: 3 - 101
"...rfix'> <span property="dc:title" content="Global Climate Change Explorer" class="rdf-meta element-hidden"></span..." Line: 533 Column: 109 - 209
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 550 Column: 3 - 98
"...rfix'> <span property="dc:title" content="Science Snacks Landing Page" class="rdf-meta element-hidden"></span..." Line: 550 Column: 106 - 206
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 564 Column: 3 - 126
"...rfix'> <span property="dc:title" content="Wired Pier | Exploratorium Environmental Field Station " class="rdf-meta element-hidden"></span..." Line: 564 Column: 134 - 234
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 578 Column: 3 - 108
"...rfix'> <span property="dc:title" content="External Content: Science of Baseball" class="rdf-meta element-hidden"></span..." Line: 578 Column: 116 - 216
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..."

Attribute “datatype” not allowed on element “span” at this point.

Line: 317 Column: 170 - 270
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 350 Column: 119 - 219
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 384 Column: 127 - 227
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 417 Column: 117 - 217
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 484 Column: 119 - 219
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 533 Column: 109 - 209
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 550 Column: 106 - 206
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 564 Column: 134 - 234
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..." Line: 578 Column: 116 - 216
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..."

No “p” element in scope but a “p” end tag seen.

Line: 336 Column: 1 - 4
"...ram. </p> </p> </di..." Line: 370 Column: 1 - 4
"...bsp; </p> </p> </di..." Line: 403 Column: 1 - 4
"...PE). </p> </p> </di..." Line: 436 Column: 1 - 4
"...ion. </p> </p> </di..." Line: 529 Column: 1 - 4
"...bsp; </p> </p></div>..."

Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)

Line: 473 Column: 8 - 30
"...'> <style type="text/css"> #bc..."

Attribute “_self” not allowed on element “a” at this point.

Line: 585 Column: 4 - 68
"...d-70"> <a href="http://www.exploratorium.edu/baseball/index.html" _self><h5>Sc..."

Warnings

Attribute with the local name “xmlns:og” is not serializable as XML 1.0.

Attribute with the local name “xmlns:article” is not serializable as XML 1.0.

Attribute with the local name “xmlns:book” is not serializable as XML 1.0.

Attribute with the local name “xmlns:profile” is not serializable as XML 1.0.

Attribute with the local name “xmlns:video” is not serializable as XML 1.0.

Attribute with the local name “xmlns:product” is not serializable as XML 1.0.

Attribute with the local name “xmlns:content” is not serializable as XML 1.0.

Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:foaf” is not serializable as XML 1.0.

Attribute with the local name “xmlns:rdfs” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioct” is not serializable as XML 1.0.

Attribute with the local name “xmlns:skos” is not serializable as XML 1.0.

Attribute with the local name “xmlns:xsd” is not serializable as XML 1.0.

The first occurrence of ID “search-block-form” was here.

Line: 136 Column: 5 - 115
"...ent"> <form class="search-form" role="search" action="/" method="post" id="search-block-form" accept-charset="UTF-8"><div><..."

The first occurrence of ID “edit-search-block-form--2” was here.

Line: 139 Column: 3 - 219
"...-form"> <input title="Enter the terms you wish to search for." class="custom-search-box form-text" placeholder="Search" type="text" id="edit-search-block-form--2" name="search_block_form" value="" size="15" maxlength="128" /> </div..."

The first occurrence of ID “edit-actions” was here.

Line: 141 Column: 1 - 57
".../> </div> <div class="form-actions form-wrapper" id="edit-actions"><input..."

The first occurrence of ID “edit-submit” was here.

Line: 141 Column: 58 - 142
"...-actions"><input type="submit" id="edit-submit" name="op" value="Search" class="form-submit" /></div>..."

The first occurrence of ID “superfish-2” was here.

Line: 113 Column: 5 - 88
"...ent"> <ul id="superfish-2" class="menu sf-menu sf-main-menu sf-horizontal sf-style-none"><li id..."

The first occurrence of ID “menu-910-2” was here.

Line: 113 Column: 89 - 144
"...yle-none"><li id="menu-910-2" class="first sf-depth-1 menuparent"><a hre..."

The first occurrence of ID “menu-2260-2” was here.

Line: 113 Column: 205 - 265
"...it</a><ul><li id="menu-2260-2" class="first sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1725-2” was here.

Line: 113 Column: 330 - 391
"...s</a></li><li id="menu-1725-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1726-2” was here.

Line: 113 Column: 479 - 540
"...g</a></li><li id="menu-1726-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-5143-2” was here.

Line: 113 Column: 603 - 664
"...r</a></li><li id="menu-5143-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1727-2” was here.

Line: 113 Column: 759 - 820
"...s</a></li><li id="menu-1727-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1729-2” was here.

Line: 113 Column: 892 - 953
"...s</a></li><li id="menu-1729-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-5144-2” was here.

Line: 113 Column: 1029 - 1088
"...s</a></li><li id="menu-5144-2" class="last sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-911-2” was here.

Line: 113 Column: 1164 - 1220
"...</ul></li><li id="menu-911-2" class="middle sf-depth-1 menuparent"><a hre..."

The first occurrence of ID “menu-2323-2” was here.

Line: 113 Column: 1285 - 1345
"...re</a><ul><li id="menu-2323-2" class="first sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1734-2” was here.

Line: 113 Column: 1423 - 1484
"...s</a></li><li id="menu-1734-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1733-2” was here.

Line: 113 Column: 1541 - 1602
"...s</a></li><li id="menu-1733-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1732-2” was here.

Line: 113 Column: 1661 - 1722
"...s</a></li><li id="menu-1732-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-2324-2” was here.

Line: 113 Column: 1809 - 1868
"...s</a></li><li id="menu-2324-2" class="last sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-912-2” was here.

Line: 113 Column: 1952 - 2008
"...</ul></li><li id="menu-912-2" class="middle sf-depth-1 menuparent"><a hre..."

The first occurrence of ID “menu-1737-2” was here.

Line: 113 Column: 2077 - 2137
"...on</a><ul><li id="menu-1737-2" class="first sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-2439-2” was here.

Line: 113 Column: 2248 - 2309
"...s</a></li><li id="menu-2439-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1735-2” was here.

Line: 113 Column: 2422 - 2483
"...g</a></li><li id="menu-1735-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1736-2” was here.

Line: 113 Column: 2590 - 2649
"...s</a></li><li id="menu-1736-2" class="last sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-913-2” was here.

Line: 113 Column: 2783 - 2839
"...</ul></li><li id="menu-913-2" class="middle sf-depth-1 menuparent"><a hre..."

The first occurrence of ID “menu-1740-2” was here.

Line: 113 Column: 2918 - 2978
"...ns</a><ul><li id="menu-1740-2" class="first sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1744-2” was here.

Line: 113 Column: 3080 - 3141
"...h</a></li><li id="menu-1744-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1743-2” was here.

Line: 113 Column: 3248 - 3309
"...s</a></li><li id="menu-1743-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-3136-2” was here.

Line: 113 Column: 3432 - 3493
"...s</a></li><li id="menu-3136-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1741-2” was here.

Line: 113 Column: 3580 - 3639
"...s</a></li><li id="menu-1741-2" class="last sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1457-2” was here.

Line: 113 Column: 3724 - 3781
"...</ul></li><li id="menu-1457-2" class="middle sf-depth-1 menuparent"><a hre..."

The first occurrence of ID “menu-1745-2” was here.

Line: 113 Column: 3859 - 3919
"...ve</a><ul><li id="menu-1745-2" class="first sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1746-2” was here.

Line: 113 Column: 3980 - 4041
"...p</a></li><li id="menu-1746-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-2317-2” was here.

Line: 113 Column: 4130 - 4191
"...d</a></li><li id="menu-2317-2" class="middle sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1748-2” was here.

Line: 113 Column: 4272 - 4331
"...e</a></li><li id="menu-1748-2" class="last sf-depth-2 sf-no-children"><a hre..."

The first occurrence of ID “menu-1696-2” was here.

Line: 113 Column: 4409 - 4453
"...</ul></li><li id="menu-1696-2" class="last sf-depth-1"><a hre..."

Empty heading.

Line: 220 Column: 390 - 419
"...ner-text'><h2 class='home-banner-title'></h2><..." Line: 231 Column: 309 - 338
"...ner-text'><h2 class='home-banner-title'></h2><..." Line: 238 Column: 294 - 323
"...ner-text'><h2 class='home-banner-title'></h2><..." Line: 245 Column: 291 - 320
"...ner-text'><h2 class='home-banner-title'></h2><..." Line: 252 Column: 327 - 356
"...ner-text'><h2 class='home-banner-title'></h2><..."

The “form” role is unnecessary for element “form”.

Line: 680 Column: 1 - 152
"...when.</p> <form role="form" action="https://cl.s7.exct.net/DEManager.aspx" name="subscribeForm" id="subscribeForm" method="post" onsubmit="return validateForm()"> <inp..."

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

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exploratorium.edu Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.

exploratorium.edu TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.

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priority - 123Optimize images

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

Your page has 36 blocking script resources and 7 blocking CSS resources. This causes a delay in rendering your page.

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priority - 34Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

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priority - 10Minify JavaScript

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priority - 7Leverage 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:

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 5.4KiB (70% reduction).

priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 326B (25% reduction).

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priority - 2Size tap targets appropriately

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exploratorium.edu HTML validation

Errors

Legacy doctype. Expected “<!DOCTYPE html>”.

Attribute “xmlns:og” not allowed here.

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Attribute “xmlns:book” not allowed here.

Attribute “xmlns:profile” not allowed here.

Attribute “xmlns:video” not allowed here.

Attribute “xmlns:product” not allowed here.

Attribute “xmlns:content” not allowed here.

Attribute “xmlns:dc” not allowed here.

Attribute “xmlns:foaf” not allowed here.

Attribute “xmlns:rdfs” not allowed here.

Attribute “xmlns:sioc” not allowed here.

Attribute “xmlns:sioct” not allowed here.

Attribute “xmlns:skos” not allowed here.

Attribute “xmlns:xsd” not allowed here.

When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.

The “version” attribute on the “html” element is obsolete. You can safely omit it.