- SEO Checker

Overview of the SEO Check
Meta information
Page quality
Page structure
Link structure
External factors
SEO Score
Response time
0.92 s
File size
61.20 kB
Media files
Number of links
144 internal / 17 external

Task list of SEO Improvements

Meta specifications

(Critically important)
American Scientist
The page title is too short. (170 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
(Critically important)
There are no problems in accessing the website.
Canonical URL
There is a valid canonical link specified.
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
(Somewhat important)
The domain name is very long.
The domain is no subdomain.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
(Nice to have)
The favicon is linked correctly.

Meta tags

viewportwidth=device-width, initial-scale=1.0
generatorDrupal 7 (
og:site_nameAmerican Scientist
og:titleAmerican Scientist
Content-Typetext/html; charset=utf-8

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Page quality

(Critically important)
No paragraphs were detected.
There are only 415 words on this page. Good pages should have about 1,000 words of useful content.
24.1% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
No placeholders texts or images were found.
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 27 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 8 tags for this page.
Image SEO
(Somewhat important)
3 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
...rg/themes/amsci/img/sigma-xi-logo-sm.pngSigma XI
...0-108-6-cover-carousel.jpg?itok=PQwEoq5pNo alt attribute provided
...0-engineering-carousel.jpg?itok=95HK03EcNo alt attribute provided
...rspective-3-carousel_0.jpg?itok=QL3IrmuiNo alt attribute provided
...-108-6-cover-natural_0.jpg?itok=rbOwZPWyNovember-December - 2020 - Volume: 108 - Number: 6

Page structure

H1 heading
(Critically important)
American Scientist
The H1 heading is too short (18 characters). It should be at least 20 Characters long.
There are 50 headings on the page. The amount of headings should be in a more proper relation to the amount of text.
Some headings do not have any content.

Heading structure

Heading levelContent
H1 American Scientist
H2 Did Intelligent Design Just Miss Its Corona Moment?
H2 Making Sense of the Brain
H2 Books on Innovation and Imagination
H2 Like an Afterburner
H2 Making a Medical Face Mask at Home
H2 What It Will Take to Reopen Schools Safely
H2 Ending the War on Drugs
H2 See-Through Biology
H2 The Argument for Learning Music
H2 Towers: Upright, Leaning, and Collapsed
H2 Pulling the Plug on Climate Change Wildfires
H2 The Rise of Parkinson's Disease
H2 Decoding Light from Distant Worlds
H2 Is There a Better Way to Control Room Temperature?
H2 Depicting the World with Mosaics
H2 Topics
H2 Lighting Up the Animal Kingdom
H2 A Publication of Sigma XI
H3 Proponents could have demonstrated the apolitical nature of their claim if they had debunked the Chinese lab myth using their methods. Instead, they have doubled down against Darwin.
H3 In his new book, Matthew Cobb skillfully guides readers through the history of neuroscience, highlighting sometimes dazzling advances while acknowledging that our understanding of the brain is stil...
H3 Empty heading
H3 Updating the theoretical model for the solar wind took years, new data, and kindness.
H3 Staff members reviewed the process of making and comfort of wearing several homemade face mask designs. [Updated 10 August 2020]
H3 Communities have to control the outbreak before schools can consider how to plan and control infections within their walls.
H3 The most influential factor in the exponential growth of a militarized, excessively penal, and discriminatory criminal justice system began with 1970s policies on substance use.
H3 Shan Zhao
H3 Nina Kraus, Travis White-Schwoch
H3 Empty heading
H3 Henry Petroski
H3 Robert Louis Chianese
H3 E. Ray Dorsey, Todd Sherer, Michael S. Okun, Bastiaan R. Bloem
H3 Kevin Heng
H3 Da Li, Carol Menassa, Vineet Kamat
H3 Julie Sperling
H3 Empty heading
H4 Evolution
H4 Biology Physiology Review Scientists Nightstand
H4 Psychology Technology Review Scientists Nightstand
H4 Astronomy Mathematics Astrophysics
H4 Art Virology
H4 Ethics Medicine Policy
H4 Sociology Social Science
H4 Biology Technology
H4 Biology Physiology
H4 Empty heading
H4 Engineering
H4 Environment Climatology
H4 Agriculture Environment Medicine Policy
H4 Astronomy Chemistry
H4 Technology
H4 Anthropology Art Environment Climatology
H4 Art Biology Chemistry Evolution
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
23 links don't have an anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
There are 17 external links on this page.
LinkAttributesAnchor text
/Anchor Skip to main content
/magazine/issues/allMagazine window External Archive window External Subscribe
/content/about-usAbout Us
/user/register?destination=homeRegister window External Twitter window External Facebook window External YouTube window External LinkedIn window External IMG-ALT Sigma XI
/American Scientist
/Anchor Open navigation
/search/nodeText duplicate Search
/user/loginText duplicate Login
/node/4661Did Intelligent Design Just Miss Its Corona Moment?
/node/4655Making Sense of the Brain
/free-tag-names/scientists-nig...Scientists Nightstand
/node/4658Books on Innovation and Imagination
/free-tag-names/reviewText duplicate Review
/free-tag-names/scientists-nig...Text duplicate Scientists Nightstand
/node/4687Like an Afterburner
/node/4634Making a Medical Face Mask at Home
/node/4663What It Will Take to Reopen Schools Safely
/node/4686Ending the War on Drugs
/free-tag-names/social-scienceSocial Science
/article/transparent-biologySee-Through Biology
/author/shan_zhaoShan Zhao
/topics-names/BiologyText duplicate Biology
/topics-names/TechnologyText duplicate Technology
/article/the-argument-for-musi...The Argument for Learning Music
/author/nina_krausNina Kraus
/author/travis_white-schwochTravis White-Schwoch
/topics-names/BiologyText duplicate Biology
/free-tag-names/physiologyText duplicate Physiology
/node/4692No Text
/node/4695No Text
/node/4695Towers: Upright, Leaning, and Collapsed
/author/henry_petroskiHenry Petroski
/node/4698No Text
/node/4698Pulling the Plug on Climate Change Wildfires
/author/robert_louis_chianeseRobert Louis Chianese
/article/the-rise-of-parkinson...The Rise of Parkinson's Disease
/author/e._ray_dorseyE. Ray Dorsey
/author/todd_shererTodd Sherer
/author/michael_s._okunMichael S. Okun
/author/bastiaan_r._bloemBastiaan R. Bloem
/topics-names/EnvironmentText duplicate Environment
/topics-names/MedicineText duplicate Medicine
/topics-names/PolicyText duplicate Policy
/article/decoding-light-from-d...Decoding Light from Distant Worlds
/author/kevin_hengKevin Heng
/topics-names/AstronomyText duplicate Astronomy
/article/is-there-a-better-way...Is There a Better Way to Control Room Temperature?
/author/da_liDa Li
/author/carol_menassaCarol Menassa
/author/vineet_kamatVineet Kamat
/topics-names/TechnologyText duplicate Technology
/article/depicting-a-fragmente...Depicting the World with Mosaics
/author/julie_sperlingJulie Sperling
/topics-names/ArtText duplicate Art
/topics-names/EnvironmentText duplicate Environment
/free-tag-names/climatologyText duplicate Climatology
/topics-names/agricultureNo Text
/topics-names/AgricultureText duplicate Agriculture
/topics-names/anthropologyNo Text
/topics-names/AnthropologyText duplicate Anthropology
/topics-names/artNo Text
/topics-names/ArtText duplicate Art
/topics-names/astronomyNo Text
/topics-names/AstronomyText duplicate Astronomy
/topics-names/biologyNo Text
/topics-names/BiologyText duplicate Biology
/topics-names/chemistryNo Text
/topics-names/ChemistryText duplicate Chemistry
/topics-names/communicationsNo Text
/topics-names/computerNo Text
/topics-names/economicsNo Text
/topics-names/engineeringNo Text
/topics-names/EngineeringText duplicate Engineering
/topics-names/environmentNo Text
/topics-names/EnvironmentText duplicate Environment
/topics-names/ethicsNo Text
/topics-names/EthicsText duplicate Ethics
/topics-names/evolutionNo Text
/topics-names/EvolutionText duplicate Evolution
/topics-names/mathematicsNo Text
/topics-names/MathematicsText duplicate Mathematics
/topics-names/medicineNo Text
/topics-names/MedicineText duplicate Medicine
/topics-names/physicsNo Text
/topics-names/policyNo Text
/topics-names/PolicyText duplicate Policy
/topics-names/psychologyNo Text
/topics-names/PsychologyText duplicate Psychology
/topics-names/sociologyNo Text
/topics-names/SociologyText duplicate Sociology
/topics-names/technologyNo Text
/topics-names/TechnologyText duplicate Technology
/article/lighting-up-the-anima...Lighting Up the Animal Kingdom
/topics-names/ArtText duplicate Art
/topics-names/BiologyText duplicate Biology
/topics-names/ChemistryText duplicate Chemistry
/topics-names/EvolutionText duplicate Evolution window External Text duplicate Twitter window External Text duplicate Facebook window External Text duplicate YouTube window External Text duplicate LinkedIn
/topics-names/allText duplicate Topics
/topics-names/all?field_media_...Text duplicate Features
/blogs/allText duplicate Blogs
/topics-names/all?field_media_...Text duplicate Video
/topics-names/all?field_media_...Text duplicate Podcasts
/magazine/issues/allText duplicate Magazine window External Text duplicate Archive window External Text duplicate Subscribe
/user?destination=homeText duplicate Newsletter
/content/about-usText duplicate About Us
/content/advertiseText duplicate Advertise
/user/loginText duplicate Login
/user/registerText duplicate Register
/search/nodeText duplicate Search
/magazine/issues/2020/november...IMG-ALT November-December - 2020 - Volume: 108 - Number: 6 window Nofollow External Anchor Text duplicate Subscribe window Nofollow External Give a Gift window Nofollow External Donate window External Text duplicate Sigma XI

Server configuration

HTTP redirects
(Critically important)
This page redirects to ""
HTTP header
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
(Somewhat important)
The page response time of 0.92 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
This page loads 27 JavaScript files. This may affect the load time negatively.
This page does not require any CSS files.
The file size of the HTML document is fine (61 kB).

HTTP Response Header

dateFri, 30 Oct 2020 15:49:19 GMT
content-typetext/html; charset=utf-8
x-generatorDrupal 7 (
link<>; rel="canonical",<>; rel="shortlink"
cache-controlpublic, max-age=86400
last-modifiedFri, 30 Oct 2020 15:45:55 GMT
expiresSun, 19 Nov 1978 05:00:00 GMT

External factors

(Critically important)
This website is not classified "for adult only".
This website is not listed on the Shallalist.
This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 9,565 referring domains.
This page has 621,920 backlinks.
This page has backlinks from 7,681 different ip addresses.
Facebook popularity
(Somewhat important)
This page has social activity like shares, comments or likes on facebook.
Listed on Webwiki
(Nice to have)
This website is listed on Webwiki.


# robots.txt
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
# This file will be ignored unless it is at the root of your host:
# Used:
# Ignored:
# For more information about the robots.txt standard, see:

User-agent: *
Crawl-delay: 10
# Directories
Disallow: /includes/
Disallow: /misc/
Disallow: /modules/
Disallow: /profiles/
Disallow: /scripts/
Disallow: /themes/
# Files
Disallow: /CHANGELOG.txt
Disallow: /cron.php
Disallow: /INSTALL.mysql.txt
Disallow: /INSTALL.pgsql.txt
Disallow: /INSTALL.sqlite.txt
Disallow: /install.php
Disallow: /INSTALL.txt
Disallow: /LICENSE.txt
Disallow: /MAINTAINERS.txt
Disallow: /update.php
Disallow: /UPGRADE.txt
Disallow: /xmlrpc.php
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips/
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register/
Disallow: /user/password/
Disallow: /user/login/
Disallow: /user/logout/
# Paths (no clean URLs)
Disallow: /?q=admin/
Disallow: /?q=comment/reply/
Disallow: /?q=filter/tips/
Disallow: /?q=node/add/
Disallow: /?q=search/
Disallow: /?q=user/password/
Disallow: /?q=user/register/
Disallow: /?q=user/login/
Disallow: /?q=user/logout/

Facebook popularity

Shares / Likes / Comments

Only the data for the given URL is shown. We cannot determine the social actions for a linked fan page.

Search preview
American Scientist

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

American Scientist83%Check

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