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Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Did you know?
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Did you know?
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.