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Did you know?

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

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Cyanide works by making the human body unable to use oxygen.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater, Details of plant population biology from repeat photography: (a) saguaro cactus in MacDougal Crater,
Bururi long-fingered frog (Cardioglossa cyaneospila) Bururi long-fingered frog (Cardioglossa cyaneospila)
Relationship of the 12 cranial nerves to specific regions of the brain. Relationship of the 12 cranial nerves to specific regions of the brain.
Possible Causes of Abnormal Specific Gravity Possible Causes of Abnormal Specific Gravity
Part of a Semantic Network in Long-Term Memory Part of a Semantic Network in Long-Term Memory
Screening a library to recover a specific gene Screening a library to recover a specific gene
Video: Evolutionary tree of life Animation

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