V404 Cygni: Huge rings around a black hole

This image features a spectacular set of rings around a black hole, captured using NASA's Chandra X-ray Observatory and Neil Gehrels Swift Observatory. The X-ray images of the giant rings reveal information about dust located ...

'Critical situation' as fires rage in Greece

"It's a very sad moment," said a villager in Evia who had to evacuate as a violent fire ravages the Greek island, one of dozens of blazes that have torn through the country this week in the worst heatwave in over three decades.

Research illuminates language of fireflies

A small flickering at dusk near the trees, a pinprick of light rising from the ground—fireflies bring an air of magic and wonder to long summer evenings. The twinkling conversation between beetles is commonly associated ...

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