A new theory of quantum subsystems

When studying a complex system, scientists identify smaller pieces called subsystems that they can make sense of. By studying subsystems and the correlations between them, they reconstruct an understanding of the whole.

Dark energy: Neutron stars will tell us if it's only an illusion

A huge amount of mysterious dark energy is necessary to explain cosmological phenomena, such as the accelerated expansion of the Universe, using Einstein's theory. But what if dark energy was just an illusion and general ...

Einstein's theory passes rigorous 16-year tests (Update)

An international team has used telescopes around the world, including CSIRO's Parkes radio telescope—Murriyang, to complete the most challenging tests yet of Einstein's general theory of relativity.

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