let's just pick an example of convergent evolution so you see here this is a classic example you have 00:11:24 um the arm or the leg in certain animals the four leg or the arm in the human or the wing of a bird and they're com they consist of all of the same bones more or 00:11:37 less

the great Oliver Sacks once said a neuron is a neuron more or less regardless of species neurons do largely similar sorts 00:10:34 of things regardless of what animal you may find them in f

Cambrian is kind of a sensory 00:13:18 it's kind of a a a Renaissance of uh sensory richness and it presents the sensory World in three dimensions which introduces certain challenges to animals and in the case of invertebrates you can 00:13:34 see there was a verb veritable explosion of of invertebrates and in in particular invertebrates with different kinds of eyes

the idea of evolutionary convergence is relatively simple it's the idea that similar environmental conditions can give rise 00:09:05 to similar biological adaptations