A fresh analysis of decades-old X-ray black hole jet data has revealed bright, lumpy features with mysterious speed changes.

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The idea ostriches bury their heads when they feel threatened is thought have come from Roman naturalist Pliny the Elder ...

The Concorde passenger jet set a record when it flew between New York City and London in 2 hours, 52 minutes, 59 seconds. The supersonic plane could fly at more than twice the speed of sound. But just ...