Modern continental rocks carry chemical signatures from the very start of our planet's history, challenging current theories about plate tectonics.

Curiosity found large organic molecules in a 2013 Mars rock sample. These fragments suggest Mars had the right chemistry for ...

"We are really trying to understand how far we can go, chemically, toward larger biological molecules and what environments are needed to form them." ...

Even more exciting, the model suggests that some Earth-like planets could form in the habitable zone—the region around a star ...