Below Our Feet May Be ‘Alien Blobs’ From An Ancient Crash, Say Scientists
An artistic illustration shows Theia impacting the proto-Earth. Artwork by Hernan Canellas/image courtesy of ASU Deep inside our planet are two giant “blobs,” the leftovers of an ancient world that collided with Earth. The blobs, which are in the mantle near the center of the Earth beneath Africa and the Pacific Ocean, have been known …