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Genetics

Sweet potatoes might have arrived in Polynesia long before humans

Genetic analysis suggests that sweet potatoes were present in Polynesia over 100,000 years ago, and didn’t need help crossing the Pacific.

Chemistry

Using laser tweezers, chemists nudged two atoms to bond

This is the first time researchers have purposefully combined two specific atoms into a molecule.

Physics

A key constant’s new measurement hints ‘dark photons’ don’t exist

New measurement of the fine-structure constant is the most precise yet.

Animals

These 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.