NASA

The cost of creating even a tiny extraterrestrial colony is far greater than the cost of fixing Earth’s problems

Well, quite a lot, actually. Allow Scott Feschuk to explain.

Speed read the news with our Talking Points round-up—our short takes on the week’s news—and sound like the smartest person in the room.

After a #YearInSpace—340 days, to precise—on the International Space Station, Scott Kelly is back on Earth with Mikhail Kornienko

With satellite images and photos taken by astronauts, NASA has released its own stunning version of the ABCs

’We now have an imperative to send astrobiologists to Mars,’ says John Grunsfeld administrator of NASA’s Science Mission Directorate

Watch highlights from the NASA press conference, held at 11:30 a.m. ET

From satellite repair to cameras that work on Mars, Canadian companies have their eyes on the heavens

If we’re going to send humans to Mars, we’re going to need a new spacesuit. And that requires decades of inventing and testing—plus danger and hope.

Franklin Chang Díaz went to space seven times. Now, he’s building a radical new engine.