also known as the “moon-forming impact,” was so large that—in addition to adding lots of material to the Earth—there was enough energy to vaporize some of the rock and metal from both the proto-Earth ...

According to a new theory, there were two giant impacts in a row, separated by about one million years, involving a Mars-sized 'Theia' and proto-Earth. In this image, the proposed hit-and-run ...

4.54 billion years ago: Formation of proto-Earth as part of the Solar System Dust and gas in the early Solar System collide and combine under gravity. This process eventually leads to the ...