🔒 Pro members only
Big Bang to Earth | 2.1
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.
This lesson is part of the members-only content of Middle school Big History. The first 3 lessons of every course are free — this one starts after the free preview.
- ✓ Unlimited access to every lesson, video and article
- ✓ All subjects and age groups in one membership
- ✓ Cancel anytime · Visa & MasterCard accepted