A weakening tropical storm Ida, which will come ashore late tonight or early Tuesday, is likely the last major threat of the 2009 Atlantic hurricane season, forecasters say.

Its skin pale and rubbery and its organs swollen with gas, an "alien" discovered in a Panama creek has now been identified by veterinarians as a common three-toed sloth.

Supposed Maya predictions of the end of the world in 2012 have some people seriously scared. See what experts say about the unknown planet predicted to pummel Earth, the cataclysmic "galactic alignment," and more.

A star explosion that blazed as bright as ten billion suns but faded away within 20 days might be the first proof of a theoretical new class of supernova, astronomers suggest.

Several graves dating as far back as the early Stone Age--complete with dog-tooth jewelry and even a sitting woman--have been discovered during extensive digs in central Germany, archaeologists say.

Just as some people today believe a Maya calendar pinpoints 2012 as the end of the world as we know it, people through centuries and across cultures have long forecast our collective doom.

Newborn babies start learning language in the womb—and are born with accent-like intonations, a new study of crying babies says.

Cosmic rays can mutate microbes and dampen immune systems—creating virulent diseases that may become a major hurdle in the quest to send humans into space, a new report says.