Mars, now a dusty world of rusted rock and thin air, once carried enough water to transform its face into something far more familiar. New mapping of ancient river systems indicates that a vast ...

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 ...

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 ...

The first thing most people think of when they consider Mars is its deep red color. The Romans associated the planet with their god of war because it reminded them of blood while the Egyptians called ...

The findings potentially solve the paradox of how liquid water seems to have persisted on Mars even when the climate grew too cold.

This doesn’t mean Mars causes ice ages on its own. Orbital cycles are only part of the picture. Earth’s oceans, atmosphere, ...