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Time Line of Human History From Upper Paleolithic Period to the Present
Woman (formerly a.k.a. the Venus of Willendorf), Lower Austria.
In middle childhood, children spend increasing amounts of time with peers and friends.
Multifocal premature ventricular contractions (PVCs).
Over time, cells acquire mutations. Two independently acquired mutations in the same cell may be suf
Cohesion–tension theory of water transport in vascular plants