News
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PhysicsOn-chip lamp scores a bull’s-eye
Etching nanoscale, concentric ridges around a lamp-on-a-chip known as a light-emitting diode, or LED, brightens the device's glow seven-fold.
By Peter Weiss -
EarthRogue alga routed
An invasive-species action team has eradicated one of the world's worst weeds, a marine alga, from a California lagoon, its only known foothold in North America.
By Janet Raloff -
EcosystemsFish as Farmers: Reef residents tend an algal crop
A damselfish cultivates underwater gardens of an algal species that researchers haven't found growing on its own.
By Susan Milius -
Health & MedicineTotal Recall: Drug shows long-lasting boosts of memory in rats
Research in rats shows that an experimental drug completely regenerates parts of the brain crucial to forming memories.