In the red rift valley of africa, anthropologist first found clues to prehistoric life. give two examples of these clues to prehistoric life, and describe their importance to to scientific research about first humans.

What federal law makes marijuana illegal i know it's a schedule 1 drug but what law specifically gives the federal government the ability to arrest or fine you over marijuana i have only been able to find info on the scheduling of the drug but it never says this or that is illegal it just says that it's a schedule 1 drug i need the wording exactly my english teacher says that if i don't have it my paper is null and void