The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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The FDA recognizes 118 routes of administration.
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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.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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.
Survivorship curve for the North American beaver.
Systems and Organs of the Human Body
European Culture in a Global Context
Canada is set to become the Saudi Arabia of the north
Polar wandering paths for Eurasia and North America