CLOTHING! It’s one thing to have a little pocket-knife sharpened rock handy, if you live in the tropics and there’s plenty to eat. A more advanced tool, with two sharp edges and a sharp point, has many more uses, including skinning animals. Which means, the invention of clothing. Which means, you don’t only have to live in the tropics...people can spread out all over the world, which they did once they figured out how to make these little tools.
This one, like the earlier tool I posted
yesterday, was found in the Olduvai Gorge in Tanzania. But little axes like this have been found all over the world. Food, shelter, & clothing, as they say...the last of these being the key to migration into the different climates.
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