Spiders who chop off their penises to save their heads

Sexual cannibalism is a remarkably common mating habit among insects and arachnids — perhaps most famously, black widow spiders and preying mantises devour males after mating with them. There are a number of competing theories about why such a seemingly harmful trait would evolve. And now we've discovered one spider… » 2/01/12 11:28am 2/01/12 11:28am

Boa constrictors only stop squeezing when your heart stops beating

Proving once again they deserve the title "most metal of all living animals", Boa constrictors know when to stop squeezing around their prey — because they can feel their victim's heart stop. The constricting method of subduing prey is a relatively costly one in terms of energy, so it behooves snakes to know as soon… » 1/19/12 5:00pm 1/19/12 5:00pm

A Pill That Stops Stress In Your Brain Before You Feel It

Stress makes many of us miserable — but it can also kill you. Besides just causing horrible anxiety and depression, the physiological basis for stress has also been linked to diseases as varied as obesity, postpartum depression, Cushing's syndrome, epilepsy, and osteoporosis. But what if we could just turn your… » 12/15/11 11:02am 12/15/11 11:02am

Solar-powered hornet is the Superman of the animal kingdom

Plants use photosynthesis to turn sunlight into energy every single day. This ability appeared to be completely unknown in the animal kingdom, leaving the living solar battery that is Superman as the only animal to ever harness the sun's rays for power. But now we've discovered that a type of hornet is doing its own… » 2/13/11 3:00pm 2/13/11 3:00pm