Sam Walker
Journalist
Sam Walker is a freelance journalist specialising in science and economics, and with a keen interest in astronomy
Recent articles by Sam Walker
Seven things on Mars that would instantly kill you (number 5 is truly terrifying!)
A crewed trip to Mars would be incredibly dangerous: here are seven reasons why
From lunar blackout to engine failure... 8 things to know about NASA's return to the Moon
What you need to know about NASA's Artemis II mission.
We may be about to see an asteroid-mining gold rush. But here's why it could be a very bad idea
We examine the scramble to harvest metals from asteroids – and why we should think twice about it
