Roger Penrose
Roger Penrose聽is one of the world's most prominent theoretical physicists who聽in 1965 produced the mathematics that showed how stars collapse to form black holes.
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Roger Penrose聽is one of the world's most prominent theoretical physicists who聽in 1965 produced the mathematics that showed how stars collapse to form black holes.
Clouds of rocks and gas known as pyroclastic flows spew out of volcanoes and race over land at terrifying speeds, skating on an air pocket beneath the rubble