July 25, 2014
Mohenjo
Science
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Black holes might end their lives by transforming into their exact opposite — ‘white holes’ that explosively pour all the material they ever swallowed into space, say two physicists. The suggestion, based on a speculative quantum theory of gravity, could solve a long-standing conundrum about whether black holes destroy information.
The theory suggests that the transition from black hole to white hole would take place right after the initial formation of the black hole, but because gravity dilates time, outside observers would see the black hole lasting billions or trillions of years or more, depending on its size. If the authors are correct, tiny black holes that formed during the very early history of the Universe would now be ready to pop off like firecrackers and might be detected as high-energy cosmic rays or other radiation. In fact, they say, their work could imply that some of the dramatic flares commonly considered to be supernova explosions could in fact be the dying throes of tiny black holes that formed shortly after the Big Bang.
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Artist’s conception of a black hole. | MARK GARLICK via Getty Images
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October 12, 2013
Mohenjo
Science
A Brief History Of Time, Alok Jha, amazon, Animated Video, animation, Black Hole, business, Business News, Cartoon, Cartoon Videos, celebrities, Hawking, Hotels, huffingtonpost, human-rights, mental-health, Physics, Physics Animated, Physics Of a Black Hole, Physics Theory, research, Science, Science News, Stephen Hawking, technology, Technology News, Theoretical Physics, Theories, Theory, travel, vacation, Video
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What’s at the center of a black hole? And what happens at the edge of a black hole?
Stephen Hawking has some big ideas that answer these big questions. Called one of the most influential physicists of our time, you might assume that his theories are too complicated for the layperson to wrap his or her mind around.
But in some ways, his ideas are easier to understand than you might think. Through animation and narration, The Guardian’s science correspondent Alok Jha explains them all in a two-and-half-minute cartoon in a way that everyone can easily grasp. Check it out above.
And why give Hawking’s theories the cartoon treatment?
“I suppose the incredible thing is that he came up with all these profound, provocative insights without the convenience of being able to write anything down,” Jha says in the video. Hawking, who authored A Brief History of Time, is paralyzed as a result of motor neuron disease.
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James' World 2 