Astrophysicists offer a possible explanation for why dark matter seems to behave differently in the Milky Way.
NASA prepares to replace the twin satellites, named GRACE, that have monitored Earth's droughts, glacial retreats and sea level rise for the last 15 years.
Physicists show how switching positive and negative charges in graphene could make the first quantum time mirror.
An app based on a flight-based study could let frequent fliers who travel near the North Pole track their radiation exposure.
New form of matter fills in a decades-old gap in theoretical physics.