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Three progressively heavier copies of each type of matter particle exist, and no one knows why. A new paper by Steven Weinberg takes a stab at explaining the pattern.
A study has cemented the link between an intense global warming episode 56 million years ago and volcanism in the North Atlantic, with implications for modern climate change.
In a new paper, physicists argue that hypothetical particles called axions could explain why the universe isn’t empty.
A proposal for building wormhole-connected black holes offers a way to probe the paradoxes of quantum information.