« previous next »
« previous next »
 

Did you know?

The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Did you know?

The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

(a) Solar-driven air circulation (a) Solar-driven air circulation
The Geometry of a Total Solar Eclipse The Geometry of a Total Solar Eclipse
Tides on Earth Tides on Earth
Saturn as Seen from Earth Saturn as Seen from Earth
The electromagnetic spectrum. Ionizing radiation is only a small portion of the electromagnetic ... The electromagnetic spectrum. Ionizing radiation is only a small portion of the electromagnetic ...
Distribution of Earth's Water Distribution of Earth's Water
Video: Neuron Structure Animation

For a complete list of videos, visit our video library