Study finds some female fish evolve bigger brains when males have bigger genitals
Wednesday, November 23, 2016 - 08:01
in Biology & Nature
Despite what you might think, evolution rarely happens because something is good for a species. Instead, natural selection favours genetic variants that are good for the individuals that possess them. This leads to a much more complicated and messy world, with different selective forces pushing in many directions, even within a single species.