# How did life begin?

Chemistry became biology at least once, probably within the first billion years. Which steps came in which order is still unknown.

Connects to:
- [How life began](https://mapideas.org/i/li_origin)
- [Deep time](https://mapideas.org/i/ea_deep)
- [Lives of stars](https://mapideas.org/i/as_stars)

Source: https://mapideas.org/i/q_x_life_begin · open on the map: https://mapideas.org/#q_x_life_begin