« previous next »
« previous next »
 

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Species, subspecies, populations, and individuals. Species are reproductively isolated from one anot Species, subspecies, populations, and individuals. Species are reproductively isolated from one anot
Earthquakes Don’t Kill People—Collapsing Buildings Do Earthquakes Don’t Kill People—Collapsing Buildings Do
The world attempted to deal with Somalia as if it were a real country but painfully learned that Som The world attempted to deal with Somalia as if it were a real country but painfully learned that Som
Wall painting with giraffes, zebra, eland, and abstract shapes, San people, Inanke Cave, Matobo ... Wall painting with giraffes, zebra, eland, and abstract shapes, San people, Inanke Cave, Matobo ...
Homeless people sleeping on the streets is a common sight in India’s cities. I took this photo in ... Homeless people sleeping on the streets is a common sight in India’s cities. I took this photo in ...
Collage of people showing emotions Collage of people showing emotions
Video: Proteins

For a complete list of videos, visit our video library