Mars

Surface-penetrating radar reveals features composed of ice, not rock

A decision must be made by the next chief executive soon on the space shuttle's fate, for starters

Unexpected chemical in Martian soil is a food source for some Earthly microbes

Mission extended five weeks until late September

For more SciAm.com coverage of the Phoenix Lander's mission on Mars, click here

To see what extraterrestrial life might be like, scientists are busy studying freshwater coral reef–like structures in a Canadian lake

A Q&A with an engineer who helped design the camera now imaging the surface of the Red Planet

Phoenix finds alkaline soil with plenty of minerals

Hemisphere-size crater documents solar system's violent origins

Bits of material uncovered by Phoenix have shrunk and disappeared

Like a summer blockbuster, this episode is full of thrills--magnets that turn off a reporter's ability to speak; indestructible unmanned aerial vehicles; and more...

Annual contest held by Mars Society highlights robotic innovation and makes for some snazzy-looking rovers