« previous next »
« previous next »
 

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Evolution of tetrapod visual opsins Evolution of tetrapod visual opsins
Rule of Nines. A method for determining percentage of body burned. Each different colored section re Rule of Nines. A method for determining percentage of body burned. Each different colored section re
The Major Divisions of the Visual Cortex of the Rhesus Monkey The Major Divisions of the Visual Cortex of the Rhesus Monkey
Workers at a Nike factory in Indonesia insert soles into sneakers for fourteen cents an hour. Workers at a Nike factory in Indonesia insert soles into sneakers for fourteen cents an hour.
Testing Distance Visual Acuity Using a Snellen Eye Chart Testing Distance Visual Acuity Using a Snellen Eye Chart
Visual Cliff Experiment Visual Cliff Experiment
Video: Fetal Development of the Cardiovascular System

For a complete list of videos, visit our video library