Hurricane Ian pounds Florida, leaves millions in dark

Hurricane Ian left much of coastal southwest Florida in darkness early Thursday, bringing "catastrophic" flooding that left officials readying a huge emergency response to a storm of rare intensity.

'Urban canyons' prolong sonic booms in cities

Twenty years after the retirement of the Concorde, several industrial and research projects want to make supersonic flight a reality again. However, supersonic planes produce sonic booms loud enough to warrant noise concerns ...

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