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Matter & Energy

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quantum lock

SECRET SAVER   Sending an encrypted message usually requires a secret key that’s at least as long as the message itself. But thanks to the laws of quantum mechanics, it’s possible to protect long secret messages with much shorter keys, a new experiment shows.

blue whirls

BLUE WHIRL  A swirling flame called a blue whirl is produced in the lab by igniting fuel floating on top of water (left). The flame first transitions into a 60-centimeter-tall fire tornado (center) before settling down into a quietly spinning blue flame (right) just 6 centimeters in height.

illustration of a wormhole

Wormholes, tunnels through the fabric of spacetime that connect widely separated locations, are predicted by Einstein’s general theory of relativity. Some physicists think that wormholes could connect black holes in space, possibly providing a clue to the mysteries of quantum entanglement and how to merge general relativity with quantum mechanics.

Matter & Energy

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