We are just leaving the extremely early stages of the earth, it was very cool. We watched the earth form along with all of the other planets from the rotating cloud of gas which contained planetesimals and eventually formed into the earth and the early planets. The earth was a giant ball of hot, molten material and all of the metals sunk to the core, which created the hot, and dense core we have now. We also went ahead and watched the giant impact happen, there was a giant explosion when the two planets collided. The earth was knocked to the side of its axis and the atmosphere was just completely blown off, while the other planet exploded into millions of pieces, which will eventually form into our moon, it was an awesome sight.