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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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

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Vaccines prevent between 2.5 and 4 million deaths every year.

Feral pigs in the United States (here Cape Canaveral, Florida) Feral pigs in the United States (here Cape Canaveral, Florida)
Saline Groundwater in the United States Saline Groundwater in the United States
Median Age at First Marriage in the United States Median Age at First Marriage in the United States
The United States under the Articles of Confederation, 1787 The United States under the Articles of Confederation, 1787
Gray Matter vs. White Matter Gray Matter vs. White Matter
Medial view of tracts revealed by removing gray matter from a midsagittal section Medial view of tracts revealed by removing gray matter from a midsagittal section
Video: Chemical Equilibrium between N2O4 (colorless gas) and NO2 (brown gas)

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