Scientists have pulled off a major feat photons that behave like twins and experience the same things simultaneously, even over great distances. The space-based technique holds potential for revolutionizing telecommunications and perhaps someday developing a hack-proof internet

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Chinese scientists have pulled off a major feat with one of the sub-atomic world's weirdest phenomena: photons that behave like twins and experience the same things simultaneously, even over great distances.

The space-based technique developed by the researchers and reported in the journal Science holds potential for revolutionizing telecommunications and perhaps someday developing a hack-proof internet.

The principle is called quantum entanglement, in which photons or neutrons are created in such a way that they are linked and behave as if they were one entity, even if they are physically separated.

In a groundbreaking experiment led by Professor Jian-Wei Pan of Hefei University in China, a laser on a satellite orbiting 300 miles above the earth produced entangled photons.

Scientists would compare photons in the weaker gravitational environment of orbit with entangled partners sent to Earth, says Anton Zeilinger, a physicist at the Austrian Academy of Sciences in Vienna.

"There are not many experiments which test links between gravity and quantum physics," he told Science.

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