Ostriches and their bloodless erections solve a centuries-old mystery

Sometimes, scientists ask deep, probing questions that cut to the very core of the universe's greatest mysteries. And sometimes, they wonder about how ostriches' and emus' penises work. And sometimes, that apparently prurient research can lead to new insights into how birds and reptiles evolved apart. » 12/12/11 4:40pm 12/12/11 4:40pm