Taxonomy term


Red Planet Roundup: December 2017

With two rovers patrolling the surface of Mars, six spacecraft orbiting above it, and scientists here on Earth studying the Red Planet from afar, new findings are announced often. Here are a few of the latest updates.

08 Dec 2017

When and how did plate tectonics begin on Earth?

Earth’s surface is a shifting puzzle of plates that collide and diverge, generating earthquakes, fueling volcanoes, opening ocean basins and raising mountain ranges. But when and how did this process — unique in our solar system as far as we know — begin? 
22 May 2017

Breakup of Pangea led to thicker oceanic crust

Oceanic crust formed at mid-ocean spreading centers, like the Mid-Atlantic Ridge, is recycled back into the mantle at subduction zones. Aside from isolated chunks that might be even older, the oldest crust found on Earth today is thought to be about 200 million years old. This old crust, portions of which are found along the outer margins of the Atlantic, Pacific and Indian oceans, is much thicker than the crust being produced today — in some places by almost 2 kilometers — according to a new study, a finding that may suggest that Earth’s supercontinent cycle affects how Earth’s interior cools.

07 Apr 2017