Evolution finally explains the real story behind the birds and the bees

For nectar-eating animals like bats, birds and bees, there is only one way to feed: they are either born with a proboscis that sucks up sweet, tasty flower sugar or a tongue for spooning it up. Whatever nectar-acquiring tool these animals are born with ultimately dictates what kind of nectar they can consume:… » 10/12/11 1:27pm 10/12/11 1:27pm