At least five Earth-sized planets appear to be orbiting their stars at just the right distance to host water.

The 150-pound Raptorex “was running things down, dispatching them with its powerful jaws, and clutching them with its two-fingered hands”—the same hunting strategy that apparently worked for 6-ton T. rex.

A total solar eclipse that darkened much of Asia on July 22 was the 21st century’s longest and gave scientists and sky-watchers an observational bonanza

Merging galaxies that forcefully eject supermassive black holes have theoretically created a class of “rogue” objects—and now scientists think they know how to find them.

The Mississippi River Delta is drowning, according to new research that predicts the surrounding coastline will be significantly reshaped in coming decades.

“There’s just not enough sediment to sustain the delta plain,” said the study’s author.

After five successful spacewalks that have left the Hubble Space Telescope more capable than ever, astronauts on the space shuttle Atlantis hold a space-based press conference.

Finding the source of a faint “shh” sound could help scientists better predict space weather, which can bombard satellites, spacecraft, and spacewalking astronauts with dangerous radiation.

The same process that drives auroras on Earth is ten times more intense on tiny Mercury, where it creates invisible whirlwinds of particles, data from a NASA craft have revealed.

A giant space blob discovered in the far reaches of the universe has scientists puzzling over what exactly the bizarre object might be, according to a new study.
At 12.9 billion light-years away, the blob—dubbed Himiko after a legendary Japanese queen—is the fourth most distant object ever discovered, said lead study author Masami Ouchi, a Carnegie [...]

Alaska’s coast is drifting into the sea at twice the rate it has in the past, reshaping the Arctic shoreline, a new study says.
The trend could seriously threaten the area’s caribou and other wildlife, as well as local landmarks that document human settlements.
Some stretches of the state’s northern shore along the Beaufort Sea receded [...]