« previous next »
« previous next »
 

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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.

An Action Potential An Action Potential
National Sleep Foundation Survey Results National Sleep Foundation Survey Results
A typical office layout. A typical office layout.
Animal that offer potential medical uses Animal that offer potential medical uses
Global list of Threatened Species Global list of Threatened Species
Predictions for the results of mutation of an overlapping and a nonoverlapping genetic code Predictions for the results of mutation of an overlapping and a nonoverlapping genetic code
Video: The Lagging Strand in DNA Replication and Replication in Action

For a complete list of videos, visit our video library