There are places where frogs could be — but aren't.
And places where frogs could be — and are.
Ninety years ago, scientists were debating the question of animal dispersal. How come there are kangaroos in Australia, and none in southern Africa --which seems, environmentally, very kangaroo-friendly? Certain frogs show up in warm ponds in one part of the world, but warm ponds a thousand miles away have none. Why?
Women have choices in contraception, from pills and injections to intrauterine devices and the NuvaRing. But when women discuss birth control with their doctors, they may not be getting all the information they want, a survey finds.
Have you ever craved a salad, I mean really craved a salad because you've been eating a lot of freeze-dried meat and beans?
Astronauts who spend months on end in space sure do miss their greens. That's why NASA is embarking on a program to get astronauts growing their own food. First stop is the International Space Station and a vegetable production system called Veg-01, or "Veggie."