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Hall, Rosbash and Young

TICK TOCK  For their research identifying the molecular workings of the biological clock, Jeffrey C. Hall, Michael Rosbash and Michael W. Young (from left to right) share the 2017 Nobel Prize in physiology or medicine.

diagram of biological clock

TIMEKEEPERS Three Americans have won the Nobel Prize in physiology or medicine for discovering the gears of circadian clocks and how they govern daily rhythms, such as sleep, metabolism and other body processes. 

RHINO TWILIGHT  As woolly rhinos dwindled to extinction, their odds of having odd ribs attached to their neck bones may have risen. Here, one of the creatures is shown in a wall painting at Chauvet-Pont d’Arc Cave in southern France.

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