Science: Wormholes in The Heavens

A far-out concept leads to talk of time travel and new universes

Since well before Albert Einstein, physicists have been conjuring up concepts that defy common sense. Consider just a few of the far-out notions now accepted by the scientific community: clocks that tick slower when they ride on rockets, black holes with the mass of a million stars compressed into a volume smaller than that of an atom, and subatomic particles whose behavior depends on whether they are being watched.

But of all the strange ideas in physics, perhaps the strangest is the wormhole. It comes perilously close to science fiction: a wormhole is a hole in the fabric of space and...

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