In October 2025, drilling operations at depths between 2,200 and 5,100 feet in northern Minnesota uncovered something extraordinary: helium-3, an ultra-rare isotope previously considered nearly ...
DULUTH — Two years after a company confirmed the presence of helium beneath the surface of Northeastern Minnesota, other companies are poking around the area for confirmation of a lightweight gas from ...
For decades, scientists have puzzled over traces of primordial helium—a rare isotope known as ³He—escaping from volcanic ...