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Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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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.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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

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There are 60,000 miles of blood vessels in every adult human.

A group of capped langurs. A group of capped langurs.
Storage devices (A) External hard-disk drive (B) USB drive (C) Memory card (D) Optical disc (DVD) ... Storage devices (A) External hard-disk drive (B) USB drive (C) Memory card (D) Optical disc (DVD) ...
A member of the Uru-Eu-Wau-Wau tribe in Brazil. The way of life of the world’s few remaining rain ... A member of the Uru-Eu-Wau-Wau tribe in Brazil. The way of life of the world’s few remaining rain ...
Methyl group metabolism and homocystinuria Methyl group metabolism and homocystinuria
Group of Gorillas Group of Gorillas
Group defenses: Cluster of sawfly caterpillars regurgitating fluid (yellow) that predators find unap Group defenses: Cluster of sawfly caterpillars regurgitating fluid (yellow) that predators find unap
Video: Cleavage and Implantation Animation

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