View of Earth from the Messenger captured by the Mercury Dual Imaging System's wide-angle camera
View of Earth created from images captured by the wide-angle camera in the Mercury Dual Imaging System (MDIS) aboard the Messenger spacecraft.
NASA
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Encyclopædia Britannica, Inc.Humpback whales (Megaptera novaeangliae) recorded at sea.
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Encyclopædia Britannica, Inc.What do you call this type of animal friendship? Mutualism, of course.Media Editor: Lauren Sims
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Encyclopædia Britannica, Inc.The land iguana (Conolophus), a species endemic to the Galapagos Islands.
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© MinutePhysics (A Britannica Publishing Partner)Ten reasons why Earth is round.
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© MinutePhysics (A Britannica Publishing Partner)Learn about defining and measuring the observable universe within the “whole” universe.
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© MinuteEarth (A Britannica Publishing Partner)The role that Hadley cells play in determining the geographic extent of tropical rainforests and deserts.
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© MinutePhysics (A Britannica Publishing Partner)Learn about the different definitions of a year: a tropical year, a sidereal year, and an anomalistic year.
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