Quantum particles have a social life, of a sort. They interact and form relationships with each other, and one of the most important features of a quantum particle is whether it is an introvert—a ...
Every year, a 20-metre Christmas tree from Norway is erected in Trafalgar Square. Image: iStock/stockcam "Trafalgar Square is changed as never before. A 48-ft Christmas tree has sprung up on the west ...
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