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Space expanding faster than light

Nothing can travel through space faster than the speed of light. But space itself? It can stretch at ANY speed. Even faster than light.
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Space is always expanding below a certain critical value after which it will collapse.so universe itself take care of that the rate never reach the critical value.so we cant really state that it can stretch at any value.
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Phase waves can travel faster than light.... But no idea about space speed as its speed is reduced by the gravitational forces exerted by celestial bodies on each other.
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Prof Hawking wrote: 'The Higgs potential has the worrisome feature that it might become megastable at energies above 100bn giga-electron-volts (GeV).
'This could mean that the universe could undergo catastrophic vacuum decay, with a bubble of the true vacuum expanding at the speed of light.
'This could happen at any time and we wouldn't see it coming.'
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