What is the world's smallest organism?
Learn what defines an organism and consider two candidates for the title of world's smallest organism—the bacteria Carsonella ruddii and Mycoplasma genitalium.
Encyclopædia Britannica, Inc.
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NASAThe Boeing-built Lunar Roving Vehicle transported astronauts and equipment across the Moon during the Apollo 15, 16, and 17 missions.
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Encyclopædia Britannica, Inc.Learn more about the problem of climate change in this interview with Bill McKibben.
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Contunico © ZDF Studios GmbH, MainzWhite sharks have been neither bred nor raised in captivity, and, thus, what biologists know about their habits and natural history has come only from direct observation in the wild.
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Encyclopædia Britannica, Inc.Gene therapy seeks to repair genetic mutations through the introduction of healthy, working genes.
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Encyclopædia Britannica, Inc.This court case went bananas.
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Encyclopædia Britannica, Inc.The 14 species of Galapagos finches differ from each other mainly in beak structure and feeding habits. The birds are believed to have undergone adaptive radiation from a single ancestral species, evolving to fill a variety of unoccupied ecological niches.
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© Open University (A Britannica Publishing Partner)Learn about the Galapagos finches, particularly the woodpecker finch (Camarhynchus pallidus); the birds played a key role in Charles Darwin's formulation of his theory of evolution.
