These Astronauts Are Getting Sealed in a Cave to Practise Life in Space

An underground cave is precisely the wrong direction if you’re hoping to go into space—so why is the European Space Agency sending the latest batch of ISS-bound astronauts on a spelunking expedition? To practise for life in a sealed tin can, of course. Read More >>

Two Key Things Astronaut Scott Kelly’s Body Will Teach Us About Living in Space

We’re all looking forward to interstellar travel and colonising Mars, but first, we’ve got a lot to learn about how the human body responds to the cold dark void of outer space. Scott Kelly’s year-long stint on the ISS, which ends tomorrow, is helping us answer some critical questions—including what weightlessness does to our vision, and whether all that extra radiation messes up our DNA. Read More >>

Orion is a Triumph. Let’s Not Waste It

NASA's spacecraft Orion just survived its very first test flight. The shiny, new space capsule will one day carry a human crew to Mars or to an asteroid—wait, which is it? Amidst the hype, there's still an unforgivable confusion about what comes next. Read More >>