When did humans migrate to the Americas
When did humans migrate to the Americas
Learn about a controversial 2017 study that used thorium/uranium dating of broken mastodon bones to argue that a prehistoric human species, such as Neanderthals, lived in North America some 130,000 years ago.
Encyclopædia Britannica, Inc.
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Contunico © ZDF Studios GmbH, MainzLearn about the bunker experiment, in which subjects were confined for weeks with no exposure to natural light and soon established their own circadian rhythms.
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Contunico © ZDF Studios GmbH, MainzDiscussion of biological clocks, including an overview of the suprachiasmatic nucleus, which controls circadian rhythms.
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Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Vladislav Kochelaevskiy/Dreamstime.com; © Photoblueice/Dreamstime.comView researchers at the anthropological institute in Göttingen studying DNA taken from Bronze Age skeletons found in the Lichtenstein Cave, Harz mountains, northern Germany.
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Encyclopædia Britannica, Inc.Learn more about the basic tenets of critical race theory.
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Encyclopædia Britannica, Inc.Learn about early species in the genus Homo and scholarly debates over what defines being human.
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© MinuteEarth (A Britannica Publishing Partner)Comparing the similarities and differences between the genomes of chimpanzees (Pan troglodytes) and human beings (Homo sapiens).
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NASA Scientific Visualization StudioLearn about the total solar eclipse of April 8, 2024, by watching this NASA visualization of the Moon's umbra—the darkest part of the Moon's shadow—as it crosses North America.
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Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Eevlva/Dreamstime.comOverview of nuclear radiation and its effects on the human body.
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