Subscription Info   Newsletter   Site Demo   Librarians   Help/FAQs   About   Contact Us   

  Log In


IMAGE OF THE WEEK
Breach Flips Magnetosphere Dogma Upside-Down

View all Images of the Week

HELPFUL TOOLS

Periodic Table


Geologic Time Scale

View all Helpful Tools, and read an article on scientific notation
Advanced Search

BIOGRAPHIES

We have more than 2000 biographies of well-known scientists.



IMAGE GALLERIES

Explore scientific phenomena through pictures.

Venomous Fishes

Mammals during the Mesozoic, the Age of Dinosaurs

.and many more.



STUDY CENTER
Tools to help you make the most of your study time.

Q&A
Our editors answer YOUR questions.

Topical Study Guides
A program of study with links to relevant articles.

AP Study Guides
Study material geared to topics covered in the AP examination. Includes multiple-choice quizzes.

Essay Topics
Suggestions for research papers and essays.

Bibliographies
The literature citations in our articles organized by topic.




 		Now on AccessScience

VIDEO: Cow Power
A source of renewable energy and a way to reduce pollution is as close as your nearest dairy farm. This ScienCentral News video explains.



Nobel Prize-winning physicist and AccessScience author Steven Chu will be U.S. Energy Secretary. Read his article, Particle trap.




My AccessScience: Save search results, bookmark articles, and archive your favorite images on the site. Click on the My AccessScience tab, above.

Try live bookmarklets in Helpful Tools to search for terms in AccessScience from any page online.

Welcome to the next generation of AccessScience: Site Tour


Q&A:
Why can't you put metal objects into Microwave ovens?



AccessScience EXPLORATIONS

Exploration: Forensics
Discover forensic science through the experiences of forensic anthropologist Clea Koff

Exploration: Pluto
What is a planet, anyway? Pluto's mystery is discussed by astrophysicist Neil deGrasse Tyson and astronomer Tobias C. Owen

Exploration: Fossil Humans
Anthropologist Eric Delson on the science of human origins, and the implications of a recent find of in Dikika, Ethiopia.








Log In Here Subscription Info

Username: 
Password: 
 




NEW ENCYCLOPEDIA ARTICLES

The newest Encyclopedia of Science & Technology articles added to the site.

 - Fuel cells for automobiles
 - Earthquake early warning
 - Desorption electrospray ionization mass spectrometry
 - Affinity monolith chromatography
 - Barcoding life
 - Anthrax bacillus and the immune response
 - Venus Express
 - Warship design trends
 - Web spam identification and blocking
 - Underground research laboratories

NEWS   



- Record low for human blood oxygen levels
- In the young universe, black holes may have formed first
- Mathematicians show how beetles can share a niche
- 
Early C-sections pose risks

- See news archive
Copyright ©2008 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use and Privacy Notice.
Additional credits and copyright information.