Primordial Helium May Be Leaking from Earth's Core
Helium gas may be seeping from Earth’s core, say scientists who found extremely high helium isotope ratios in lavas on Baffin Island
Unintended Geoengineering
A global timekeeping problem postponed by global warming - Nature
Increased melting of ice in Greenland and Antarctica, measured by satellite gravity, has decreased the angular velocity of Earth more rapidly than before and has already affected global timekeeping.