Sign up for the MSNBC newsletter

You have been successfully added to our newsletter.

Let our news meet your inbox

Hardball

Cloud-like 'plume' on Mars baffles scientists

Mystery in space: Scientists are puzzled by images of Mars that show a vast plume of haze in the planet's hemisphere. What exactly is it? Dr. Seth Shostak from the SETI Institute weighs in.

BEST OF MSNBC

Play All