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Dark matter obeys gravity after all — could that rule out a 5th fundamental force in the universe?
Scientists have discovered that dark matter, the universe's most mysterious "stuff," obeys gravity on vast cosmological ...
Metrology, the branch of science dedicated to measurement, has created better and better systems of measurement for the kilogram based on fundamental principles rather than arbitrary chunks of metal ...
NASA's Chandra X-ray Observatory has discovered part of an intergalactic web of hot gas and dark matter that contains most of the material in the universe. The hot gas, which appears to lie like a fog ...
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