re: #71 the1sgjohns

Still doesn’t explain the pre-Cambrian explosion.

The so-called Cambrian ‘explosion’ lasted longer than the time from the extinction of the dinosaurs 65 million years ago until now. What happened was that some organisms evolved the ability of directed locomotion (swimming); these purposively mobile organisms had at their disposal a plethora of static food sources and no natural enemies, so practically every nonlethal mutation could thrive. Then mobile predators developed, and an evolutionary arms race ensued between predator and prey.