Latest Craig Stillwell Stories

In most animal species, males and females show obvious differences in body size. But how can this be, given that both sexes share the same genes governing their growth? University of Arizona entomologists studied this conundrum in moths and found clues that had been overlooked by previous efforts to explain this mystery of nature.Take a look around in the animal world and you will find that, in most organisms, individuals of one sex are larger than the other of the species.Even though...