3 ms·
When natural selection doesn’t explain an expensive trait, chances are sexual selection is at work. Social creatures often have bigger brains, but my guess woul
by reubenswartz 8y ago
When natural selection doesn’t explain an expensive trait, chances are sexual selection is at work. Social creatures often have bigger brains, but my guess would be sexual selection, mixed with some other traits that made it feasible to fuel such a hungry organ, are behind our inordinately large heads. :)
- dragonwriter 8y ago> When natural selection doesn’t explain an expensive trait, chances are sexual selection is at work. Sexual selection is an element of natural selection (which is about fitness measured by ability to have offspring that reproduce), so if it is at work, natural selection does, in fact, explain the trait.