Human body – history of medicine
Ebers Papyrus, one of the oldest known medical texts about the human body. From Egypt, about 1550 BC How does the human body work? Doctors have been trying to figure [...]
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What is jade? Metamorphic rock
What is jade? Jade rock from Alaska Jadeite and nephrite Jade is really two kinds of metamorphic rock, jadeite and nephrite, that look pretty much exactly the same. Scientists can [...]
