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NASA has selected the astronauts who will blast off on new commercial space vehicles set for next year. Two of them flew on the final mission of NASA's space shuttle in 2011.

Leaders make decisions for a group in the same way they make choices for themselves, a study suggests. They don't change their decision-making behavior, even when the welfare of others is at stake.

Many spiders ply the skies by riding "balloons" of silk. And they rely on something more than just the wind to take them high up and far away.

Only two northern white rhinos remain, and they're both female. But researchers said Wednesday that they successfully have created embryos using sperm collected from the males before they died out.

A committee of experts examined about a dozen different synthetic biology technologies that could be potentially misused. For each, they considered how likely it was to be usable as a weapon.

Scientists and National Institutes of Health officials met with alcohol company executives and appeared to solicit money from them in violation of government policy. The NIH canceled the study.

Research shows that bees possess a mathematical ability once thought to exist only in dolphins, primates, birds and humans who are beyond the preschool years.

Guns are the most common method used for suicide, accounting for the deaths of almost half the people who kill themselves, a Centers for Disease Control and Prevention study finds.

The crash of the space rock that slammed into the Yucatan Peninsula also warmed up the Earth's atmosphere for 100,000 years. And scientists say it's a cautionary tale for people living today.

A working group convened by the National Institutes of Health looked at where chimps that had been used in research should live now. Unless relocating chimps would endanger them, a sanctuary is best.

Scientists are trying to figure out how green-blooded lizards might benefit from the unusual pigment. The answer could provide new insights into human illnesses like jaundice and malaria.

In 2015, to great fanfare, NASA announced a planet discovery considered a milestone in the hunt for another Earth. But now some researchers say it's not clear that this planet actually exists.

The European Space Agency has released a chart of the exact positions of many stars in the Milky Way and neighboring galaxies. But the map only shows a small fraction of what's out there.

NASA is launching a mission to find Earth-sized planets beyond our solar system that scientists can study for signs of life. Scientists already know of over 3,000 planets around distant stars.

The supermassive black hole lurking at the center of our galaxy appears to have a lot of company, according to a new study that suggests the monster is surrounded by about 10,000 other black holes.

In 1996, Congress limited the Centers for Disease Control and Prevention's ability to study gun control. That will change with the new budget, but gun violence researchers aren't impressed.

Some say the new appropriations bill contains language that will free up the Centers for Disease Control and Prevention to do more gun violence research, but others are more skeptical that anything will change.

Most of the Chinese space lab, the size of a city bus, will burn up in the atmosphere, but some debris may survive re-entry.

E.coli bacteria, each cell trapped in a tiny tube, are giving researchers the chance to study the pace and effects of single genetic mutations. Most mutations, the scientists find, aren't harmful.

A new study suggests that the early universe got an unexpectedly cold start, and that dark matter may be to blame.