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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.
Did you know?
Cyanide works by making the human body unable to use oxygen.
Did you know?
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.