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dead stars illustration

TRIPLE THREAT  A threesome of dead stars has allowed a new test of a tenet of Einstein’s theory of gravity. The trio includes a pulsar (illustrated, with bands of electromagnetic radiation in blue) in orbit with a nearby white dwarf. A second white dwarf orbits farther afield (red, upper right).

frog video screenshot

Research on the biophysics of frog tongue adhesiveness provided fodder for one of our most popular video stories of 2017. (Watch the video below.)

Swedish grave excavation

RUMOR HAS IT  Researchers stirred up controversy this year by claiming that a skeleton discovered in a Swedish grave (excavation illustrated above) belonged to a Viking woman warrior. Other potentially big scientific discoveries also generated buzz — and disagreement — in 2017.

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