# Deep time

The Earth is about 4.5 billion years old. Layers of rock, read like pages, gave people a way to feel the age. James Hutton and later geologists made it a measurable thing.

Connects to:
- [Earth](https://mapideas.org/i/earth)
- [Evolution](https://mapideas.org/i/li_evolution)
- [How life began](https://mapideas.org/i/li_origin)
- [Plate tectonics](https://mapideas.org/i/ea_plates)
- [The arrow of time](https://mapideas.org/i/ti_arrow)
- [The expanding universe](https://mapideas.org/i/as_expansion)
- [How did life begin?](https://mapideas.org/i/q_x_life_begin)
- [Can we feel deep time?](https://mapideas.org/i/q_x_feel_deep)

Sources:
- [Wikipedia: Geologic time scale](https://en.wikipedia.org/wiki/Geologic_time_scale)
- [Wikipedia: Deep time](https://en.wikipedia.org/wiki/Deep_time)

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