Petite parrots provide insight into early flight

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High-speed video shows that tiny parrots direct their hops to use the least amount of energy necessary.

The Zika epidemic began long before anyone noticed

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Zika spread undetected into Brazil and Florida, a genetic study suggests.

New test may improve pancreatic cancer diagnoses

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Blood test that detects five tumor proteins may someday help doctors better screen for pancreatic cancer.

Don’t dismiss negative mass

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Walter Greiner

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