Biology, 23.07.2019 09:30, lemonsalt9378

In order for scientist to know which fossils are older or younger, they must look at the layers of the earth. though the layers can be disrupted they know that the older layers are on the bottom and the younger are on the top. what is the name of the law that they use?

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In order for scientist to know which fossils are older or younger, they must look at the layers of t...