Knitting is hundreds of years old, but similar techniques are even older: sprang dates back to 1400 BCE at least, and nålebinding as far as 6500 BCE.
In 1924 Nikolai Vavilov, a Russian / Soviet scientist, identified the geographic regions where crops were first domesticated: the Vavilov Centres of Diversity.
For a period of about four thousand years, during the Neolithic Subpluvial, the Sahara was green. Rivers, lakes, trees, savanna, and pre-historic societies flourished in this wet period.
In 1939, a geologist dug up mammoth-ivory fragments inside a cave in Germany. Two weeks later, World War II began and they were forgotten. The fragments were reconstructed later, and turned out to be the earliest art in the world.
Why would someone want a hole in the head? And how do we know that it was prehistoric surgery and not, you know, murder?
Farmers remove weeds from their crops. But they miss the weeds that look like crops. Over time, these weeds come to mimic the crops around them. And in some cases, they become crops themselves.