Part 1 of 5 · freeIntroduction
13.8 billion years ago, everything that exists today was packed into an extremely dense, extremely hot state. Scientists sometimes call this beginning a singularity: a point where density and temperature are so extreme that our usual laws no longer describe the situation.
Then the universe began to expand. This is not a bomb throwing matter into a void that was already there. It is space-time, the fabric that ties space and time together, that grows and carries matter with it. That story is still going on today.
The rest is in the Sophia app.The remaining parts, the open-book quiz and the full glossary. Free to start; Premium unlocks everything.
- 2Not an explosion in a void
- 3Three great proofs
- 4The story in fast-forward
- 5And tomorrow?
Open-book quiz10 questions whose answers are in the text.
Glossary10 terms explained in a tap.
30 languagesThe same course, from French to Japanese.
