Episode guide
Dinosaur Fossils: How Scientists Tell Time
A fossil is a bone that learned to be a stone, and a stone that remembers. This episode digs slowly through layers of rock that work like pages in Earth's diary.
The science, gently
- Fossils form when minerals slowly replace buried bone, turning it to stone over millions of years.
- Deeper layers of rock are usually older, so digging down is reading backward in time.
- Most creatures never become fossils; each one found is a rare, lucky page.
Wonder together
- If your day were a rock layer, what would be pressed inside it?
- How do you think it feels to be the first person ever to see a bone that old?
- What would you want a scientist in the far future to find from you?
Tonight's calm-down
Time in rocks moves slower than anything you know. Tonight can be slow too. Settle into your layers, blanket over sheet over you, and let today become one thin, finished page.