plate tectonics

For the first time, researchers attempted to measure all the material leaving and entering a mountain range over more than a million years and discovered that erosion caused by glaciation during ice ages can, in the right circumstances, wear down mountains faster than plate tectonics can build them.

The long-standing mantra about Mars has been to follow the water.

Planet Earth is situated in what astronomers call the Goldilocks Zone—a sweet spot in a solar system where a planet’s surface temperature is neither too hot nor too cold.