Observe a zebra herd on the African plains and the mutualistic relationship it shares with the oxpecker
Zebra behaviour as filmed on the plains of Africa.
Encyclopædia Britannica, Inc.
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Encyclopædia Britannica, Inc.Learn more about refraction.
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Encyclopædia Britannica, Inc.Archaeopteryx is the earliest known dinosaur that's also a bird.
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Encyclopædia Britannica, Inc.Every minute, multiple liters of air are cycled through your lungs.
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Encyclopædia Britannica, Inc.Learn about the difference between prokaryotes and eukaryotes.
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© MinuteEarth (A Britannica Publishing Partner)A survey of the largest known single living organisms on Earth, which includes representatives from the animal, plant, and fungal kingdoms.
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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.Learn what defines an organism and consider two candidates for the title of world's smallest organism—the bacteria Carsonella ruddii and Mycoplasma genitalium.
