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AstronomyA sandy core may have kept Enceladus’ ocean warm
Friction in Enceladus’ porous core could help heat its ocean enough to keep it liquid for billions of years.
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NeuroscienceAlzheimer’s protein can travel from blood to build up in the brain
Experiments in mice show Alzheimer’s protein can travel from the blood of an affected mouse to the brain of a healthy animal.
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EcosystemsInvasive species are a growing global threat
'The Aliens Among Us' describes how invasive species are colonizing — and disrupting — ecosystems worldwide.
By Sid Perkins -
ClimateHumans are driving climate change, federal scientists say
Human influence “extremely likely” to be dominant cause of warming in last 70 years, U.S.