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Fifty years ago, Apollo 8 lifted off. It was the first time humans left low-earth orbit and flew to the moon. The mission capped a difficult year in U.S. history.

Secretary of Defense James Mattis braved policy differences and style differences with President Trump. What does his departure mean for the White House and what does it say about Trump's Cabinet?

Seattle tried an experiment to increase citizen participation in elections by mailing out thousands of vouchers good for donating to local campaigns. How did the Democracy Vouchers work out?

Lucianne Walkowicz is all for space exploration, but says we shouldn't expect Mars to save us from a damaged Earth. She warns us not to lose sight of preserving the home we already have.

Space is an extreme environment filled with radiation, and next to no oxygen. To survive there, Lisa Nip says humans are going to have to change themselves ... genetically.

Stephen Petranek says, in the next decade, we will send humans to colonize Mars. He lays out the technology--from water-extraction to bricks made of Martian soil--that'll make life possible there.

Priests who sexually abuse children are like Judas Iscariot, the disciple who betrayed Jesus Christ, Pope Francis told a gathering of cardinals on Friday.

North Carolina lost a lot of old trees this year to storms, like hurricanes Florence and Michael. Those made the headlines along with storm coverage....

The Netherlands branch of the organization published a slick magazine about refugees called "Glamoria" and put a flirtatious photo of a woman wearing life jackets on the cover.

Earth may not be the only place in our solar system with life, says James Green. New data shows life might have existed on Mars, and could exist now. But what does that mean for us on Earth?