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PhysicsA key constant’s new measurement hints ‘dark photons’ don’t exist
New measurement of the fine-structure constant is the most precise yet.
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AnimalsThese hummingbirds aim their singing tail feathers to wow mates
Acoustic cameras reveal how male Costa’s hummingbirds can aim the sound produced by fluttering tail feathers during courtship dives.
By Susan Milius -
AstronomyWith the launch of TESS, NASA will boost its search for exoplanets
The Transiting Exoplanet Survey Satellite will set the stage for the next chapter of exoplanet exploration.
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PaleontologyColorful moth wings date back to the dinosaur era
Microscopic structures that scatter light to give color to the wings of modern butterflies and moths date back almost 200 million years.