Particles on the Red Planet can be as coarse as asbestos ... many others could become life-threatening. The makeup of Martian regolith isn’t necessarily a dealbreaker for astronauts, however.

As the race to send humans to Mars intensifies, scientists are sounding the alarm about a silent threat that could undermine ...

The study comes just when NASA’s Curiosity rover detected the largest organic compounds ever found on Mars. But while that ...