How Evolution Works

I was just thinking again about those glowing monkeys again - the ones with the bio-luminescence gene.

It strikes me that if an hedgehog passed on a mutation that caused ts children to have hi-viz prickles, that would be a decent adaptation and they might thrive (although it might be good news for badgers). At any rate, they'd get run over less often.

Whereas if a ninja had the same mutation, it wouldn't necessarily be such a good thing.