- Two Russian cosmonauts floated outside the International Space Station on Wednesday for a six-hour space walk to replace science experiments and jettison two unneeded antennas.
NEW YORK - A comet from the outer reaches of the solar system on Sunday made a rare, close pass by Mars where a fleet of robotic science probes were poised for studies.
ATHENS - Archaeologists unearthed the missing head of one of the two sphinxes found guarding the entrance of an ancient tomb in Greece's northeast, as the diggers made their way into the monument's inner chambers, the culture ministry said on Tuesday.
TEL AVIV - Personal genetics company 23andMe and Israel's MyHeritage said on Tuesday they would collaborate to enable people to discover their heritage based on genetic ancestry and documented family history.
LONDON - Scientists studying fossils have discovered that the intimate act of sexual intercourse used by humans was pioneered by ancient armored fishes, called placoderms, about 385 million years ago in Scotland.
- Opponents of GMO food labeling proposals on the ballot next month in Oregon and Colorado have contributed roughly $20 million for campaigning against the proposed laws, nearly triple the money raised by supporters of the initiatives, campaign finance reports show.
LOS ANGELES - The U.S. military landed its X-37B robotic space plane at Vandenberg Air Force Base in central California on Friday, ending a classified 22-month mission that marked the third in Earth orbit for the experimental program, the Air Force said.
BERLIN - Scientists from around the world met this week to decide whether to call time on the Holocene epoch after 11,700 years and begin a new geological age called the Anthropocene - to reflect humankind's deep impact on the planet.
WASHINGTON - Tornadoes in the United States are increasingly coming in swarms rather than as isolated twisters, according to a study by U.S. government meteorologists published on Thursday that illustrates another trend toward extreme weather emerging in recent years.
WASHINGTON - The new U.S. Ebola "czar" starts work on Wednesday as the Obama administration ramps up its response to the potential spread of the virus, and drugmakers started a project to accelerate development of a vaccine and produce millions of doses.