I'd give laser pointers to Neanderthals. Even if they did figure out some useful application for them (maybe hunting?) they'd run out of batteries eventually.

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[โ€“] 5 points 1 year ago*

The idea that nobody understood the concept of zero until long after the Greeks is just something I can never understand.

Just... how? I don't remember having to be taught what zero was, I'm pretty sure I grokked it instantly.

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