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Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

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

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

The rock cycle and the Earth’s physical environment The rock cycle and the Earth’s physical environment
Human of the planet's net primary production and appropriation of NPP Human of the planet's net primary production and appropriation of NPP
CO2 follows glacial cycle CO2 follows glacial cycle
Access to clean drinking water is just as important as adequate nutrition for human health Access to clean drinking water is just as important as adequate nutrition for human health
A bipedal human A bipedal human
Video: Energy sources - types

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