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SpaceUsing dead stars to spot gravitational waves
Astronomers are proposing a novel way to detect gravitational waves using ultraprecise observations of already known stars.
By Ron Cowen -
AnthropologyHobbit foot, hippo skulls deepen ancestral mystery
Hobbit fossils pose puzzling evolutionary questions for scientists in two new studies, one of hobbit foot bones and another of brain size in extinct pygmy hippos.
By Bruce Bower -
PhysicsMolecule turns red at breaking point
Materials made with a color-changing molecule may offer a red signal when under stress.
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LifePortuguese trove of trilobite fossils
Fossils include largest known trilobite specimen and groups of the ancient arthropods caught in the act of molting and spawning.