# Neutrinos From Deep Inside Earth Provide a New Picture of the Mantle
Scientists have found a remarkable new way to study Earth's interior by detecting ghostly subatomic particles called geoneutrinos. These particles are produced naturally when radioactive elements like uranium and thorium decay deep within our planet. Because neutrinos can pass through virtually any material without being stopped, they carry direct information about Earth's deep interior straight to detectors on the surface.
A network of sensitive neutrino detectors positioned around the globe is now capturing these underground signals and building an unprecedented picture of the mantle, the thick rocky layer that lies beneath Earth's crust. By analyzing where geoneutrinos originate and how many are detected, researchers can estimate how much radioactive material is present in different regions deep below us. This is a significant achievement because the mantle is otherwise nearly impossible to sample or observe directly.
The findings are helping scientists better understand the radioactive heat engine that drives plate tectonics, the slow movement of Earth's crustal plates that shapes mountains, triggers earthquakes, and fuels volcanoes. Knowing how much uranium and thorium are distributed throughout the mantle helps researchers figure out how much heat is generated internally versus left over from Earth's formation. This knowledge gives us a clearer picture of how our planet works and how it has evolved over billions of years.