Observe mountain lion cubs playing and being cared for by their mother
Puma (Puma concolor) cubs and mother.
Encyclopædia Britannica, Inc.
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Contunico © ZDF Studios GmbH, MainzFilming Alaska's black bears (Ursus americanus) in their natural habitat.
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Encyclopædia Britannica, Inc.Learn more about refraction.
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Encyclopædia Britannica, Inc.Video showing how roots take up substances from the soil via osmosis, diffusion, and active transport.
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Encyclopædia Britannica, Inc.Lions (Panthera leo) engaging in various activities such as hunting, eating, grooming, and sleeping.
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Encyclopædia Britannica, Inc.Plot twist: bears aren't true hibernators.Media Editor: Miranda Chabot
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Encyclopædia Britannica, Inc.Each offspring is a combination of its two parents, receiving some dominant traits from its mother and others from its father.
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Encyclopædia Britannica, Inc.Learn what defines an organism and consider two candidates for the title of world's smallest organism—the bacteria Carsonella ruddii and Mycoplasma genitalium.
News •
No. 3 Utah snaps three-game losing streak to No. 7 BYU with 28-20 win over Cougars
• Nov. 7, 2026, 5:12 PM ET (AP)
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