Researchers find highest levels of helium-3 in Arctic lava flows, potentially suggesting a leak from Earth's core. Baffin Island rocks reveal higher levels of rare isotope than previously reported, reinforcing the possibility of a core leak. Despite the leakage, the remote location and low concentration of helium-3 make it currently non-threatening.
https://bgr.com/science/troubling-discovery-suggests-the-earths-core-is-leaking/