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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

The role of leptin in regulating appetite and metabolic rate. The role of leptin in regulating appetite and metabolic rate.
SHEEP HEART SHEEP HEART
Right-sided Heart Failure Right-sided Heart Failure
Conduction system of the heart. Conduction system of the heart.
Advection of an air mass with a different ELR (environmental lapse rate). Advection of an air mass with a different ELR (environmental lapse rate).
The age-adjusted rate of melanoma, a deadly form of skin cancer, from 1973 to 2000. Over that time p The age-adjusted rate of melanoma, a deadly form of skin cancer, from 1973 to 2000. Over that time p
Video: Mendel's pea plant, Pisum sativum experimental

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