* Astronomy

Claim made for hydrogen 'wonder material'

Scientists in the US say they have at last managed to turn hydrogen into a state where it behaves like a metal.
If that is true - and it is a controversial claim - it fulfils a more than 80-year quest to produce what many have said would be a wonder material.
Theory suggests metallic hydrogen could be used to make zero-resistance electrical wiring and super-powerful rocket fuel, among many applications.
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