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Ultima Thule

SLOW SMASH  The two lobes of Ultima Thule probably came together at the speed of a person walking briskly into a wall, researchers announced.

a camera sitting on a melt pond

MISSING ICE Cameras, like this one, set up in the Chukchi and Bering seas, record how much light reaches through the melt ponds that sit atop sea ice. More light means more algal blooms grow below the surface.

Earth magnetic field

ANIMAL MAGNETISM  Like birds, bacteria and other creatures with an ability known as magnetoreception, humans can sense Earth’s magnetic field (illustrated), a new study suggests.

gray wolf

BACK ON TOP  Smithsonian Channel’s new documentary Epic Yellowstone describes the return of gray wolves to Yellowstone National Park, and the critical role such top predators play in the park’s ecosystem.  



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