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Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Cross Section of a Bone Cross Section of a Bone
long bone long bone
The hyoid bone from a Neandertal and a chimpanzee. The hyoid bone from a Neandertal and a chimpanzee.
Three phases of bone infection. Three phases of bone infection.
The inverse-square law and its effects. Doubling your distance away from a radioactive material ... The inverse-square law and its effects. Doubling your distance away from a radioactive material ...
The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ... The material safety data sheet (MSDS) for sulfuric acid showing the detailed technical information ...
Video: Chemical Equilibrium between N2O4 (colorless gas) and NO2 (brown gas)

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