What are some of the major events covered in the Marvel Timelines?

The Marvel Timelines cover a vast range of events, including the origins of the Celestials, the early history of Earth, the rise of the Inhumans, the Kree-Skrull War, the formation of the Avengers, major cosmic events like the Infinity Gauntlet saga, and the Secret Wars. They delve into the histories of individual characters like Captain America, Iron Man, and Spider-Man, placing their key moments in chronological order.