Fossils

Millions of years ago, some dinosaurs needed to kill other dinosaurs in order to survive. Like for example, a T-Rex hunting another dinosaur.
Just give up already!
Never!
When a dinosaur eats another dinosaur, its bones are left to hang and over time, the bones get buried by mud and sand.
Tasty!
Now this is where the law of superposition comes in play. The rock layer at the top is the youngest and the rock layer at the bottom is the oldest.
Oldest
Youngest
As of today, most fossils are found in sedimentary rocks and most fossils are extinct organisms.

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