There’s a recent veritasium video on jumping spiders. Turns out some of them evolved red colour eyesight in multiple independent ways, one example involves repl

There’s a recent veritasium video on jumping spiders. Turns out some of them evolved red colour eyesight in multiple independent ways, one example involves replicating a green colour vision gene and then mutation, another one adding a filter on top of green colour receptors, forcing neurons to activate on red instead!