Plate tectonics give rise to Earth's mountain ranges, earthquakes and the long-term movement of continents, and may even have provided the right conditions for life on Earth. But as far as we know, no other bodies in the solar system exhibit plate tectonics today. Why is our world different?
"We don't know for sure," Bradford Foley, a geodynamicist at Penn State, told Live Science. "I think it's still considered one of the great unsolved problems in geophysics today."
