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mammoth, mastodon, and gomphothere

MAMMOTH WORLD  A Columbian mammoth (Mammuthus columbi), an American mastodon (Mammut americanum) and a gomphothere (Cuvieronius) were among the prehistoric elephant relatives that roamed North America and Eurasia until the end of the last ice age.

TREAD LIGHTLY  Tiny pieces from rubber tires, brake pads and asphalt make up most of the airborne microplastic pollution around three German highways, a study finds.

spoonbill sandpipers

BABY BEWARE  Climate change may be spoiling the Arctic as a low-predator haven for ground-nesting shorebirds like these spoonbill sandpipers, named for their distinctive bills.

skulls and bone fragments from Lagoa Santa, Brazil

REVEAL  DNA analyses of these skulls and bone fragments from Lagoa Santa, Brazil, and other ancient remains from North and South America are helping scientists learn more about the peopling of the Americas.

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