Australian experts have developed new formulas to allow Einstein's theories to work beyond the speed of light.
Despite this, what will happen when matter passes the speed of light remains a mystery.
Applied mathematicians Professor James Hill and Dr Barry Cox of the University of Adelaide report their extension of Einstein's special theory of relativity in the Proceedings of the Royal Society A.
"The special theory of relativity is one of the most successful theories on the planet.
It's been verified in many many instances," says Hill.
"We've tried to project the special relativity theory beyond the speed of light."
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