13.8 billion years ago: Before the creation of the universe, there are six singularities: time, mind, reality, soul, power, and space. After the Big Bang, the Celestials forge these singularities into the Infinity Stones. Around the same time the stones are created come the Dark Elves.
2.5 million years ago: A vibranium meteorite hits Wakanda.
2988 B.C.: The Dark Elves try to destroy the Nine Realms with the Reality Stone, but Bor, Odin's father, defeats their leader Malekith and seals away the stone.