the.com/core heating
earth runs a furnace nobody lit, and it's still burning four billion years later.
means the process by which a planet's interior stays hot, driven by leftover formation heat and ongoing radioactive decay.
from comes from planetary science trying to explain why earth's inside hasn't gone cold like a dead ember — the answer turned out to be part inheritance, part slow nuclear fire.
radioactive decayuranium, thorium, potassium quietly cooking the mantle
primordial heatleftover energy from earth's violent accretion, 4.5 billion years old
core temperatureroughly as hot as the sun's surface, 5,700°c
drives everythingpowers plate tectonics, magnetic field, volcanoes