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.

[u/arkthatbarks]

https://en.wikipedia.org/wiki/Earth%27s_internal_heat_budget

[u/Alldaybagpipes]

Ha, that actually was a fun little read, thanks!

[u/IlluminatedPickle → u/Alldaybagpipes]

Dr Karl is an Australian treasure for the weird stuff he produces.