Marks left in Martian soil by the Curiosity Rover's SAM instrument, which was used to detect the presence of water. (Credit: NASA)









More to explore:

Universe May Be Curved, Not Flat (Scientific American)

Air Apparent: Pluto's Eternal Atmosphere (Scientific American)

Astronaut and a Writer at the Movies (New York Times)

Analysis of Surface Materials by the Curiosity Mars Rover (Science Magazine)

Ancient Supervolcanoes Revealed on Mars (Nature News) (Scientific American is part of the Nature Publishing Group)