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| | Science Timeline |
 | | About 1000 bce, mule breeders noticed that "a mare crossed with a donkey yields a mule, whereas a stallion crossed with a donkey produces a hinny, which has shorter ears, a thicker mane and tail, and stronger legs than the mule. |
 | | About 510 bce, Almaeon of Crotona, a member of the Pythagorean medical circle, located the seat of perception in the brain, or enkephalos, and maintained that there were passages connecting the senses to the brain, a position he was said to have arrived at by dissections of the optic nerve. |
 | | About 330 bce, Heraclides of Pontus said that the earth turns daily on its axis "while the heavenly things were at rest..., considered the cosmos to be infinite..., [and] with the Pythagoreans, considered each planet to be a world with an earth-like body and with an atmosphere" (Dreyer 1906:123-125). |
| www.sciencetimeline.net /prehistory.htm (6591 words) |
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