How did the complexity of the Universe increase from the Big Bang to the formation of the Earth? Take a journey through time and space to learn about the first four Big History thresholds.

Was the Big Bang the start of the Universe… or was it the beginning of one part of the multiverse? We don’t really know the answer to that question, but we do know a lot about what happened right after the Big Bang.

Even on a dark, clear night, in the remotest place on Earth, you can only see a fraction of the true number of stars in the Universe. Explore how these trillions of celestial bodies added complexity to what was once a very simple place.

Stars make the night sky very beautiful, but their deaths can be even more beautiful than their lives. When stars go supernova, these massive explosions give us the elements that make everything from planets to ladybugs to you possible!

You might know the names of all the planets in our Solar System, but do you know how our Sun and planets formed? Journey through time and space and witness the cosmic collisions that led to the formation of our planetary system.

Earth is just one planet amongst many in the Universe, but we think this planet is pretty special! Learn about the fiery early days of our planet and why this one planet among countless others increased the complexity of the Universe in a way that may be unique.