For roughly a billion years of Earth’s deep past, the Moon’s ocean tides may have slowed the planet while a Sun-driven atmospheric tide sped it up, holding the day near 19 hours — but the rocks preserve a hypothesis, not a stopwatch

Earth’s day may have stalled near 19 hours when a Sun-driven atmospheric tide balanced lunar braking, but the geological evidence remains compelling rather than conclusive. The post For roughly a billion years of Earth’s deep past, the Moon’s ocean tides may have slowed the planet while a Sun-driven atmospheric tide sped it up, holding the day near 19 hours — but the rocks preserve a hypothesis, not a stopwatch appeared first on Space Daily .