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brain cleaning illustration

THE CLEAN CYCLE  Lack of sleep may contribute to Alzheimer’s disease by robbing the brain of the time it needs to wash away sticky proteins.

Pluto mountains

UPS AND DOWNS  This view shows Pluto’s highest mountains, which rise 3 to 6 kilometers above the smooth nitrogen-ice plains of Sputnik Planitia. New maps of Pluto’s topography show more details of familiar landscapes like this one.

IceCube Neutrino Observatory

PARTICULATE PURSUITS Lightweight particles from outer space called neutrinos, caught by particle detectors like the IceCube Neutrino Observatory in Antarctica (shown), are giving new insight into a menagerie of celestial objects.  

blazar illustration

HOME BASE  Scientists traced a high-energy neutrino back to its source: a blazar, a galaxy harboring a supermassive black hole that fuels powerful jets of particles.



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