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Illustration of a clock in a spiral

Time loops may not be forbidden by physics after all

5 July 2022

Physicists find that causal loops, where two events separated in time influence each other in paradoxical ways, are allowed in many theoretical universes, some of which share features with our own
A photograph of the optical table on which a quantum computer, made from specially engineered diamonds, can very efficiently cool itself just by performing calculations.

Quantum computer cools itself down by performing calculations

1 July 2022

As they warm up, quantum computers can slow down or stop working altogether. A new kind made with specially engineered diamonds cools as it calculates
Nanosccale channels and molecules moving through them

Molecular computer uses 10,000 times less energy than a normal one

1 July 2022

A chip-sized biocomputer uses molecules moving through a network of channels to solve problems. It uses much less energy per calculation than a traditional computer

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