
Martian Soils Point to Ancient Acid Ocean--And a Dearth of Life

Martian Soils Point to Ancient Acid Ocean--And a Dearth of Life

Martian Markings
Spring in the southern hemisphere of Mars brings with it mystery. Every year, without fail, strange fan-like markings and dark spots appear on the ice cap at the Martian South Pole and disappear as the red planet's summer wanes.


Did Life Come from Another World?
New research indicates that microorganisms could have survived a journey from Mars to Earth

Red Star Rising
Small, cool stars may be hot spots for life

Making Tracks on Mars
At last, some form of intelligence is altering the dusty face of our neighboring world

How do scientists determine the composition of the interior of Earth and other planets?

Meteorites Paint Picture of a Forever-Frigid Mars

The Many Faces of Mars
One rover found an ancient desert; the other, a once watery world. The Red Planet's diversity rivals Earth's

Martian Aurora Is One of a Kind

Mars Spacecraft Snaps Shots of Other Orbiting Satellites

Red Planet's Ancient Equator Located

Researchers Develop New Machine for Detecting Signs of Life on Mars