The genetic homeland of Native Americans is a small mountainous region in southern Siberia, a new study suggests.

For mammals, evolving into bigger sizes takes a lot longer than shrinking, new evolution study shows.

A vast iceberg is splitting from Antarctica, thanks to a giant crack in a glacier that's "really important" to sea level rise.

The likely rocky planet orbits squarely in its star's habitable zone, making it a prime candidate for life, astronomers report.

Two tiny satellites add to the planet's swarm of "backward" moons and bring the full Jovian family up to 66 natural satellites.

Bacteria in water-filled Caribbean sinkholes could offer clues to what might live on icy moons such as Europa, scientists say.

Early spring or long winter? "Immortal" rodent Punxsutawney Phil has made his forecast. Get the odd facts behind Groundhog Day 2012.

With ancient origins, "immortal" rodent Punxsutawney Phil rules Groundhog Day 2012. Get the surprising facts behind winter's wackiest U.S. weather prediction.

A fossil croc sporting an odd head "shield" has been found in Morocco, paleontologists say.

 

For the first time, a NASA spacecraft has directly observed particles that came from beyond our solar system, astronomers announced.

A new analysis of Kepler data hints that scientists can add more than 400 new worlds to the NASA mission's confirmed discoveries.

A new report highlights advancements in recycling technology and predicts growth in treatment programs, if people can get beyond ick factor.

The first picture of a planet outside our solar system may actually depict a swirl of space dust, a new study suggests.

Invasive Burmese pythons are likely behind "dramatic" declines of the swamp's mammals—from rabbits to bobcats—new research suggests.

A new population of one of the world's rarest primates has been found in a Colombian park, conservationists announced today.

What's more, the Scottish island complex may have been the model for England's famous stone-circle site, new data suggest.

By zapping a scrap of metal with superpowerful x-rays, scientists created plasma that rivals the sun for heat.

The recent uptick in solar flares and other sun activity has been causing orbiting debris to fall faster, a NASA scientist reports.

Clouds of slow-moving charged particles reach from the top of Earth's atmosphere to a quarter of the distance to the moon, new data show.

It may be barren, but California's Ubehebe Crater is anything but dead, according to a new study.