| Science Timeline (6591 words) |
 | In the second millenium bce, in the Rig-Veda it was maintained the Earth was a globe and in the Yajur-Veda that the Earth circled the Sun. |
| 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. |
| By about 335 bce, Aristotle had said that universals are abstractions from particulars and that we "have knowledge of a scientific fact when we can prove that it could not be otherwise." But "since observation never shows whether this is the case," he established "reason rather observation at the center of scientific effort" (Park 1990:32). |
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