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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Field Spaniel Field Spaniel
Glaucoma. (a) A buildup of pressure within the eye cavities, often caused by a blockage of vessels t Glaucoma. (a) A buildup of pressure within the eye cavities, often caused by a blockage of vessels t
The first step in field recovery involves surveying the site, sometimes with special equipment. The first step in field recovery involves surveying the site, sometimes with special equipment.
Damage to Field CA1 Caused by Anoxia Damage to Field CA1 Caused by Anoxia
A football game, in 1879, pits Yale against Princeton. The field was not lined or bounded, and play A football game, in 1879, pits Yale against Princeton. The field was not lined or bounded, and play
Early cities were small economic centers surrounded by walls to keep out enemies. These cities had ... Early cities were small economic centers surrounded by walls to keep out enemies. These cities had ...
Video: Electrical changes in the heart

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