Fifty years on from a groundbreaking paper, geophysicists have progressed from believing continents never moved to thinking that every movement may leave a lasting memory on our planet.
Earth is the only planet in our solar system with both plate tectonics and life. Is there a connection?
Many of the new planets found in other star systems have some extraordinary orbital behavior. So what's going on?
Jupiter had a big influence on how our solar system's planets formed. New research – led by a high school student – tried to nail down how rare Jupiter analogs really are in other planetary systems.
The New Horizons spacecraft is only hours away from its closest approach to Pluto. It's hoped the brief encounter will help answer many questions about the oddball member of our solar system.