Venus may have had plate tectonics billions of years ago, a finding that opens the door for the possibility of early life on the planet.

Venus is about 4.5 billion years old, but it looks a lot younger. A new discovery may explain the secret to its youthful appearance.

A new finding contradicts previous assumptions about the role of mobile plate tectonics in the development of life on Earth.

New research could eventually lead to better earthquake models on strike-slip faults, regions with frequent and major earthquakes.

Iceland's Fagradalsfjall volcano began erupting August 3. An expert explains what makes the country a "double whammy" for volcanic activity.

Force generated by the pull of the sun on the moon, rather than heat, may be responsible for the movement of the Earth's tectonic plates, researchers argue.

New results "suggest that Earth, like the other rocky planets Mercury and Mars, is cooling and becoming inactive much faster than expected."

"Eggshell planets" have an ultra-thin outer brittle layer and probably no plate tectonics. That raises questions about their habitability.

"If you send a spacecraft to the surface of Venus, which has been done several times, they only last a few minutes until the hot acid burns them up."

Tectonic motion in the form of crustal blocks that have jostled against each other suggests Venus may still be geologically active, researchers say.