News in Brief
- Space
Mars meteorite reveals its age
Long difficult to estimate, date of space rocks' formation emerges with new technique.
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Neutrinos caught in evasive behavior
First proof of character shift documented at Japanese detector.
- Animals
Dolphins name themselves with a whistle
The marine mammals respond only to their own handles.
- Earth
Millions of years ago, frozen ice sheet in East Antarctica melted
Warming may have caused ice sheet collapse and huge increase in sea level.
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