Just One Molecule Allows Us to See Millions More Colors Than Our Pets

Early Mars Climate was Complex, with Streams Flowing Intermittently for Millions of Years

Do Pets Make You Happier? New Study Says Not Always

Water may have flowed intermittently in Martian valleys for hundreds of millions of years. Using impact craters as a dating tool, researchers determined maximum timescales for formation of Martian valley networks shaped by running water - which has big implications for early Mars' habitability.