ancient earth

Ancient Earth’s hot interior created “graveyard” of continental slabs

Ancient Earth’s hot interior created “graveyard” of continental slabs

Plate tectonics has shaped the Earth’s surface for billions of years: Continents and oceanic crust have pushed and pulled on each other, continually rearranging the planet’s façade. As two massive plates collide, one can give way and slide under the other in a process called subduction. The subducted slab then slips down through the Earth’s viscous mantle, like a flat stone through a pool of honey.

NASA Team Looks to Ancient Earth First to Study Hazy Exoplanets

NASA Team Looks to Ancient Earth First to Study Hazy Exoplanets

For astronomers trying to understand which distant planets might have habitable conditions, the role of atmospheric haze has been hazy. To help sort it out, a team of researchers has been looking to Earth – specifically Earth during the Archean era, an epic 1-1/2-billion-year period early in our planet’s history.