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Planetary ScienceTitan’s organic cloud
The Cassini spacecraft has imaged a huge cloud that engulfs most of the north pole of Saturn's icy moon Titan and could be a source of the moon's hydrocarbon lakes.
By Ron Cowen -
Health & MedicineSmall tweaks prevent 1918-flu transmission
Just a couple of small genetic changes in a pandemic flu virus prevented it from passing efficiently between lab animals.
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Health & MedicineOrexin-blocking pill speeds sleep onset
A new compound that inhibits the activity of the alertness-promoting brain peptide orexin shows promise as a potential sleeping pill.
By Ben Harder -
Terrorism sparks heartfelt aftermath
Although terror-attack survivors often rebound emotionally, their bodies stay on heightened alert long after such traumas, according to tests of witnesses to the 1995 Oklahoma City bombing.