The interior of Mars is as chunky as a delicious macadamia cookie. A new analysis of the acoustic waves that ripple through and bounce around the red planet's guts reveals that the ancient, early ...

Add Yahoo as a preferred source to see more of our stories on Google. The European Space Agency's Rosetta mission captured this view of Mars as it flew past on ...

Frigid water helped paint Mars red and may have shaped a vast coastline, two new studies into the planet’s history reveal. Scientists have detected a possible ancient beach in Mars’ northern ...

Mars gets its red color from oxidized iron dust, and the oldest myth mistake remains the same: Mars is Roman, while Ares is Greek.

Did Mars once have a full magnetic field in its ancient past like Earth does today, or was it lopsided and only covered one-half of the planet? This is what a recent study published in Geophysical ...

"Mars and its secrets have fascinated and mystified humans since ancient times. Its vivid color and visibility to the naked eye, its geologic kinship with Earth, its potential as our best hope for ...