« previous next »
« previous next »
 

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Scale used to measure pupil size in millimeters. Scale used to measure pupil size in millimeters.
Scaling the Earth down to the size of a basketball, the Moon is roughly the size of a tennis ball. T Scaling the Earth down to the size of a basketball, the Moon is roughly the size of a tennis ball. T
Scaling of Size to Other Traits. Scaling of Size to Other Traits.
Does Intelligence Increase with Brain Size? Does Intelligence Increase with Brain Size?
Vehicles equipped with onboard refueling vapor recovery usually have a reduced-size fill tube. Vehicles equipped with onboard refueling vapor recovery usually have a reduced-size fill tube.
Size of Particles Size of Particles
Video: Transferring genes into plants Animation

For a complete list of videos, visit our video library