Look out, dark energy: A TARDIS may be the real reason the universe is accelerating.
Regions in space-time that are bigger on the inside than the outside — just like the sci-fi character Doctor Who's TARDIS (Time and Relative Dimension in Space) time machine — could help explain the universe's quickening expansion.
These theoretical bubbles are named "Tardis regions." They're not a perfect explanation of how the expansion occurs, but they are a first step in making a model that is closer to reality, its proponents said
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"The idea was to get this proof of principle, that this is possible that you can do it," Syksy Rasanen, a lecturer in theoretical physics at the University of Helsinki, told SPACE.com. "We're not claiming the inside of the hole is realistic, but it's the first model where we have an exact solution where structures that are distributed randomly in space have a significant effect on the expansion rate." Read more...
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