Gravitational wave astronomy has detected nearly 100 cosmic events since 2015, confirming Einstein's predictions and revealing black holes and neutron stars in unprecedented detail. These ripples in spacetime are testing the limits of physics and opening new frontiers in our understanding of the universe.
Scientists are hunting for cosmic strings, invisible defects in spacetime left over from the Big Bang, using gravitational wave detectors, cosmic microwave background surveys, and gravitational lensing. While none have been found yet, the search refines our understanding of the early universe and could validate Grand Unified Theories.
Scientists searching for alien Dyson spheres face an unexpected challenge: exotic stellar objects called strange stars could produce nearly identical observational signatures, creating a cosmic shell game between natural phenomena and potential technosignatures.
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