A new study reveals a hidden risk for Mars missions: astronauts could lose strength even if muscle size stays the same.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Mars is racing through time ...

Earth would certainly be different without its rusty red neighbor. No Mars in the night sky, no target for future human exploration. Now, however, scientists say this scenario would result in much ...

Mars is about half Earth’s size and roughly a tenth its mass — not really the sort of planet you’d expect to leave fingerprints on Earth’s climate history. Yet a new set of simulations by an ...

Thanks to Einstein’s relativity, time flows differently on Mars than on Earth. NIST scientists have now nailed down the difference, showing that Mars clocks tick slightly faster—and fluctuate over the ...

"Without Mars, Earth's orbit would be missing major climate cycles. What would humans and other animals even look like if Mars weren't there?" When you purchase through links on our site, we may earn ...

At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. And yet, new research reveals the extent to which Mars is quietly tugging on Earth’s orbit and shaping ...

Compared with Earth, Mars is tiny, yet it seems to have an outsized effect on our planet’s climate cycles. Similar small planets could affect the climates of worlds beyond our solar system, which we ...

"A three-body problem is extremely complicated. Now we're dealing with four: the sun, Earth, the moon and Mars. The heavy lifting was more challenging than I initially thought." When you purchase ...