Plants Use Weapons To Compete Against Each Other During Reproduction

It's not uncommon for males of various species to physically battle it out in an effort to win over females. But plants, because they can't move or fully sense their environment, don't partake in this reproductive process. Well, at least that's what we thought. » 3/20/14 1:40pm 3/20/14 1:40pm

Sex evolved to prevent parasite infections, say scientists

Sexual reproduction that involves two partners is far less efficient than self-fertilization — at least, from the perspective of evolution. So why did creatures like humans ever start having sex with each other? According to a new study, we did it to fight parasites. We spoke with the researchers to discover what this … » 7/07/11 11:18am 7/07/11 11:18am