« previous next »
« previous next »
 

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

If you could remove all of your skin, it would weigh up to 5 pounds.

20,000 year old Arctic ground squirrel mummy 20,000 year old Arctic ground squirrel mummy
Vertebral compression Fractures of the spine (vertebra) can cause severe ”band-like” pain that radia Vertebral compression Fractures of the spine (vertebra) can cause severe ”band-like” pain that radia
Bone fractures that occur before death show signs of healing. The process of fracture healing starts Bone fractures that occur before death show signs of healing. The process of fracture healing starts
Waterspouts are tornadoes that occur over warm-water bodies, instead of over land. Waterspouts are tornadoes that occur over warm-water bodies, instead of over land.
Arctic warming: Drunken trees Arctic warming: Drunken trees
Three polar bears investigate an American submarine that surfaced in ice-covered Arctic waters. Three polar bears investigate an American submarine that surfaced in ice-covered Arctic waters.
Video: Heart Chambers

For a complete list of videos, visit our video library