Emerging evidence suggests that plate tectonics, or the recycling of Earth's crust, may have begun much earlier than ...

If the crust is brand-new volcanic rock, its chemistry will look much like the mantle from whence it came. If it is remelted and recycled by plate tectonics, this chemistry shifts. An influential ...

Look. The land on Earth is made up ... It is made up of large slabs called tectonic plates. The plates fit together like jigsaw puzzle pieces far beneath our feet. Tectonic plates move - usually ...