Relativity
Scientists have used data from the loudest black hole merger ever detected to test Albert Einstein's theory of general relativity, finding it holds true with remarkable precision. The 2025 event, known as GW250114, provided the clearest gravitational wave signal to date. This breakthrough builds on previous tests and highlights ongoing advancements in detection technology.
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Physicists at the National Institute of Standards and Technology have precisely calculated how time flows differently on Mars compared to Earth, showing clocks there tick 477 microseconds faster per day on average. This variation, influenced by gravity and orbits, fluctuates by up to 226 microseconds throughout the Martian year. The findings are vital for future navigation and communication in Mars exploration.