Evidence of plant or animal life preserved in stone.

This is called a fossil

the remain of an animal or plant over the years will have been molded into rock or deposit. Hope this helps:)

s the president shall be commander in chief of the army and navy of the united states, and of the militia of the several states, when called into the actual service of the united states; he may require the opinion, in writing, of the principal officer in each of the executive departments. sooo yeahhh

explanation:

he is known for discovering   the fossil of a female hominin australopithecine   known as "lucy" in the afar triangle region of hadar, ethiopia.

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