NASA scientists have discovered evidence that could help answer questions surrounding the history of water loss on Mars.

The team studying these sounds found that Mars' thin air, composed mostly of carbon dioxide, makes sound waves behave differently. On Earth, sound travels at roughly 767 mph. On Mars, deeper pitches move at about 537 mph, with higher ones traveling a bit faster, at 559 mph.

The latest selfie by NASA's Perseverance rover at Mars has captured an unexpected guest: a Martian dust devil.

NASA has revealed a concept for the next generation of flight on the Red Planet, the "Mars Chopper." Credit: Space.com | animation courtesy: NASA/JPL-Caltech | edited by Steve Spaleta Music: Last Odys

Though little is known about Deimos, another European spacecraft recently captured unprecedented views of the moon's far side. The Hera mission, which will study the asteroid NASA intentionally crashed into three years ago, flew by the Red Planet on March 12, just 11 days after the rover looked up.

I'm incredibly excited, as part of the Ars Live series, to host a conversation with some of the very best space reporters in the business this afternoon, May 29, at 3 pm EDT about the future of NASA and its deep space exploration ambitions. You can watch Ars Live here.

US President Donald Trump wants to tap the private sector to pave the way for human missions to Mars in a proposal that closely aligns with the goals of Elon Musk.

A number of high-profile missions would get the axe, including the New Horizons Pluto probe and Juno Jupiter orbiter.