Tools & Wizards About Us
learn.amnh.org screenshot

Report Summary

  • 33

    Performance

    Renders faster than
    53% of other websites

  • 72

    Accessibility

    Visual factors better than
    that of 37% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

learn.amnh.org

Online Science Courses for Educators | Seminars on Science

Page Load Speed

1.3 sec in total

First Response

87 ms

Resources Loaded

940 ms

Page Rendered

273 ms

learn.amnh.org screenshot

About Website

Visit learn.amnh.org now to see the best up-to-date Learn Amnh content for United States and also check out these interesting facts you probably never knew about learn.amnh.org

Earn graduate credit and improve your teaching skills in engaging science courses, authored by experts at the American Museum of Natural History.

Visit learn.amnh.org

Key Findings

We analyzed Learn.amnh.org page load time and found that the first response time was 87 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

learn.amnh.org performance score

33

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

38/100

10%

LCP (Largest Contentful Paint)

Value6.1 s

12/100

25%

SI (Speed Index)

Value8.4 s

18/100

10%

TBT (Total Blocking Time)

Value920 ms

30/100

30%

CLS (Cumulative Layout Shift)

Value0.023

100/100

15%

TTI (Time to Interactive)

Value15.4 s

7/100

10%

Network Requests Diagram

learn.amnh.org

87 ms

learn.amnh.org

114 ms

seminars-on-science

146 ms

gtm.js

187 ms

54d161e410edfcbd1b395429132de543_1721314572_all.css

27 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 5% of them (2 requests) were addressed to the original Learn.amnh.org, 87% (34 requests) were made to Amnh.org and 3% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (493 ms) relates to the external source Player.vimeo.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 95.8 kB (29%)

Content Size

335.6 kB

After Optimization

239.8 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Learn.amnh.org main page is 335.6 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Images take 229.9 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 89.4 kB

  • Original 99.4 kB
  • After minification 67.5 kB
  • After compression 10.0 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 31.9 kB, which is 32% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 89.4 kB or 90% of the original size.

Image Optimization

-3%

Potential reduce by 6.3 kB

  • Original 229.9 kB
  • After minification 223.5 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Learn Amnh images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 35 B

  • Original 6.3 kB
  • After minification 6.3 kB
  • After compression 6.3 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

Requests Breakdown

Number of requests can be reduced by 6 (24%)

Requests Now

25

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Learn Amnh. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

learn.amnh.org

learn.amnh.org

87 ms

learn.amnh.org

learn.amnh.org

114 ms

seminars-on-science

seminars-on-science

146 ms

gtm.js

gtm.js

187 ms

54d161e410edfcbd1b395429132de543_1721314572_all.css

54d161e410edfcbd1b395429132de543_1721314572_all.css

27 ms

lazysizes_with_bg.min.js

lazysizes_with_bg.min.js

54 ms

45f23ef900fd51f7a986d424a5662878_1697127540_all.css

45f23ef900fd51f7a986d424a5662878_1697127540_all.css

49 ms

email-decode.min.js

email-decode.min.js

34 ms

8306693221dd3452102d5596aa81c223_1698340433.js

8306693221dd3452102d5596aa81c223_1698340433.js

45 ms

c431322002a54a5b26c3fd5a1fc8ca8e_1717085410.js

c431322002a54a5b26c3fd5a1fc8ca8e_1717085410.js

182 ms

ls.respimg.min.js

ls.respimg.min.js

157 ms

268048015

268048015

493 ms

amnh-logo-white.svg

amnh-logo-white.svg

137 ms

facebook-f_white.svg

facebook-f_white.svg

138 ms

x-twitter_white.svg

x-twitter_white.svg

138 ms

envelope_white.svg

envelope_white.svg

139 ms

google-classroom_white.svg

google-classroom_white.svg

136 ms

seminars-on-science-logo-with-tagline.png

seminars-on-science-logo-with-tagline.png

166 ms

nav-bottom-border.png

nav-bottom-border.png

166 ms

pause_white.png

pause_white.png

167 ms

merriweather-regular.woff

merriweather-regular.woff

138 ms

merriweather-700.woff

merriweather-700.woff

132 ms

montserrat-regular.woff

montserrat-regular.woff

74 ms

montserrat-500.woff

montserrat-500.woff

154 ms

montserrat-700.woff

montserrat-700.woff

159 ms

ncslet-icons.ttf

ncslet-icons.ttf

80 ms

merriweather-italic.woff

merriweather-italic.woff

203 ms

merriweather-700italic.woff

merriweather-700italic.woff

208 ms

montserrat-500italic.woff

montserrat-500italic.woff

262 ms

montserrat-italic.woff

montserrat-italic.woff

279 ms

carousel-arrow_left_2x.png

carousel-arrow_left_2x.png

127 ms

carousel-arrow_right_2x.png

carousel-arrow_right_2x.png

130 ms

icon1_2x.png

icon1_2x.png

149 ms

icon2_2x.png

icon2_2x.png

150 ms

icon3_2x.png

icon3_2x.png

161 ms

icon4_2x.png

icon4_2x.png

155 ms

carousel_course_virology_2x_wide_1020.jpg

carousel_course_virology_2x_wide_1020.jpg

23 ms

carousel_course_ecology_2x_wide_1020.jpg

carousel_course_ecology_2x_wide_1020.jpg

27 ms

api.js

api.js

10 ms

Accessibility Review

learn.amnh.org accessibility score

72

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

[aria-hidden="true"] elements contain focusable descendents

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

learn.amnh.org best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

learn.amnh.org SEO score

75

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Learn.amnh.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Learn.amnh.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

learn.amnh.org

Open Graph data is detected on the main page of Learn Amnh. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: