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The New York City borough of Manhattan at night, viewed from the Rockefeller Center observation deck. Sergi Reboredo/VW Pics/Universal Images Group via Getty Images

Artificial light lures migrating birds into cities, where they face a gauntlet of threats

Migrating birds need stopover locations en route where they can rest and feed. A new study shows that artificial light draws them away from sites they would normally use and into risky zones.
Radio observatories like the Green Bank Telescope are in radio quiet zones that protect them from interference. NRAO/AUI/NSF

Radio interference from satellites is threatening astronomy – a proposed zone for testing new technologies could head off the problem

Many telescopes use the radio spectrum to learn about the cosmos. Just as human development leads to more light pollution, increasing numbers of satellites are leading to more radio interference.

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