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Chemistry

Salt stretches in nanoworld

Finding could lead to new technique for making tiny wires.

Paleontology

Flexible molars made chewing champions out of duck-billed dinosaurs

Tiny scratches in the fossilized teeth of Edmontosaurus suggest what these large herbivores ate and how they ate it.

Life

H1N1 racks up frequent flier miles

Analyzing global flight paths may help researchers track pandemics, as a new study on H1N1 shows.

Earth

Dirty snow may bring green burst to mountain peaks

Dust blowing in from distant deserts speeds the melting of snow and may shake up ecosystems on the slopes.