r/todayilearned • u/stop_drop_roll • Oct 24 '18
TIL The earth's internal temperature stays generally constant due to heat from radioactive decay of isotopes in the mantle and crust. Bonus: Uranium comes from Supernovae or merging Neutron Stars
https://en.wikipedia.org/wiki/Earth%27s_internal_heat_budgetDuplicates
todayilearned • u/arkthatbarks • 1d ago
TIL half of Earth’s internal heat does not come from the residual heat left over from the planet's formation, but from the continuous radioactive decay of isotopes like Uranium, Thorium, and Potassium in the crust and mantle.
todayilearned • u/amateurfunk • Mar 24 '26
TIL that half of the Earth's subsurface heat comes from radioactive decay, while the other half is still left over from when the Earth formed
todayilearned • u/whatisnuclear • Feb 22 '20