The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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Cyanide works by making the human body unable to use oxygen.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
Ionic bonding in table salt (NaCl)
Covalent Bonding Can Form Compounds
Compounds
Ionic Bonds: Cations vs. Anions
How many sigma bonds and how many pi bonds are in this molecule?
The Ames test for potential mutagenicity of chemical compounds