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CosmologyIn an epic cosmology clash, rival scientists begin to find common ground
Different measurements of the cosmic expansion rate disagree. The James Webb telescope could determine whether that disagreement is real.
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PhysicsA nuclear clock prototype hints at ultraprecise timekeeping
Nuclear clocks could rival atomic clocks and allow for new tests of fundamental physics. A new experiment demonstrates all the ingredients needed.
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EnvironmentFiddler crabs are migrating north to cooler waters
The crabs are climate migrants and could be a harbinger of changes to come as more species move in.
By Luke Groskin -
PaleontologyDespite new clues, this ancient fish has stumped scientists for centuries
The 50-million-year-old Pegasus volans isn't closely related to seamoths or oarfish, like some researchers have suggested.