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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.
Reindeer antlers grow again each year under a layer of fur called velvet. This reindeer is losing th
A child with a hearing impairment wears a hearing aid (as noted in his left ear).
Available Fresh Water per year
Brain nerve and hearing
Relative levels of neuronal loss in HD transgenic mice