Of the more than 1,000 verified planets found by NASA's Kepler Space Telescope, eight are less than twice Earth-size and in their stars' habitable zone.
Credit: NASA
Planet Earth is situated in what astronomers call the Goldilocks Zone -- a sweet...
Helobdella robusta, a tiny freshwater leech that attacks and kills snails.
Credit: Photo by Ajna S. Rievra/UC Berkeley
Leeches, despite the yuck factor, have captured the hearts of two University of California, Berkeley, scientists who are part of a team...
Female mountain gorilla. The ancestors of simian primates -- such as gorillas, gibbons and tamarins -- were among the first to give up nocturnal activity altogether.
Credit: © F.C.G. / Fotolia
Mammals only started being active in the daytime after non-avian...
Tomato plants produce repellent chemicals called volatile organic compounds in response to herbivore attacks. (Stock image)
Credit: © slavomir pancevac / Fotolia
In sports, sometimes a player has to take one for the team. The same appears to be true in...
