Categories Articles Planetary heartbeat? Earth has a geologic ‘pulse’ every 27.5 million years Post author By crystalg Post date June 21, 2021 Study Finds Tags 'heartbeat', 27.5, Earth, Every, geologic, million, planetary, pulse, years ← The best Prime Day lightning deals include 50% off Fire TV Sticks and savings on Apple AirPods, robot vacuums, and more → Carl Nassib Becomes First Active NFL Player to Come Out as Gay