Access sciencebulletins.amnh.org. Science Videos | American Museum of Natural History

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value6.1 s

12/100

25%

SI (Speed Index)

Value9.0 s

14/100

10%

TBT (Total Blocking Time)

Value5,990 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value15.5 s

7/100

10%

sciencebulletins.amnh.org

248 ms

Our browser made a total of 1 request to load all elements on the main page. We found that all of those requests were addressed to Sciencebulletins.amnh.org and no external sources were called. The less responsive or slowest element that took the longest time to load (248 ms) belongs to the original domain Sciencebulletins.amnh.org.

Content Size

565.7 kB

After Optimization

226.7 kB

In fact, the total size of Sciencebulletins.amnh.org main page is 565.7 kB. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. CSS take 368.5 kB which makes up the majority of the site volume.

HTML Optimization

-26%

Potential reduce by 3.0 kB

Original 11.3 kB
After minification 11.3 kB
After compression 8.3 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 3.0 kB or 26% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

Original 82.3 kB
After minification 82.3 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. Science Bulletins Amnh images are well optimized though.

JavaScript Optimization

-24%

Potential reduce by 24.6 kB

Original 103.6 kB
After minification 103.6 kB
After compression 79.1 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 24.6 kB or 24% of the original size.

CSS Optimization

-85%

Potential reduce by 311.4 kB

Original 368.5 kB
After minification 368.3 kB
After compression 57.0 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Sciencebulletins.amnh.org needs all CSS files to be minified and compressed as it can save up to 311.4 kB or 85% of the original size.

Requests Now

After Optimization

Besides the initial HTML request, no CSS, Javascripts, AJAX or image files were requested in the course of web page rendering.

Accessibility Issues

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.

High

[aria-*] attributes do not match their roles

These items highlight common accessibility best practices.

High

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

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

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/).

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 Sciencebulletins.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 Sciencebulletins.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

sciencebulletins.amnh.org

Open Graph description is not detected on the main page of Science Bulletins Amnh. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: