Trickle of Salt Water -- on Mars

Streaking (enhanced here with color) on Mars' Horowitz Crater may have been created by seasonal water, say scientists. Click to enlarge this image. 
Science/AAAS

THE GIST

• A NASA orbiter has found possible evidence for water on the surface of Mars that flows seasonally.
• Follow-up laboratory experiments should prove or disprove theory.
• The water likely would be salty, in keeping with the salty Martian environment.