About 2.3 million years ago our ancestors invented their first primitive tool, the split stone, which they used for cutting and scraping. Modern humans first appeared about 200,000 years ago. About 50,000 years ago they (or should that be we?) began to use language, symbols, and more complex tools. As inventions and discoveries added to one another, human civilization, technology, and science advanced and evolved. If you’re looking for scientists in particular fields, you could try our pages here:

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