News
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SpaceSaturn’s quadruple play
Last February, the Hubble Space Telescope captured a portrait of Saturn as four of its moons simultaneously passed in front.
By Ron Cowen -
EarthNorth America’s smallest dino predator
A new fossil analysis uncovers what may have been North America’s tiniest dino predator.
By Sid Perkins -
Health & MedicineMicroRNAs provide telltale signature of organ rejection
Levels of microRNAs in the blood and tissue distinguish rejected transplants from healthy tissue.
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PhysicsElusive Higgs particle has fewer hideouts
Physicists have announced new limits on the mass of the elusive Higgs boson. The particle's discovery would complete the standard model of particle physics.