Massive helium reservoir with 'mind-boggling' concentrations may be even bigger, more concentrated than we thought

An aerial view of the helium drilling site near Babbitt, northern Minnersota.

A helium reservoir in northern Minnesota is likely to be "expansive both laterally and at depth," a new survey shows.

Seismic data from a 0.7-mile-long (1.1 kilometers) sweep just outside of Babbitt suggest the recently discovered reservoir is larger than initial estimates indicated, which has resource exploration company Pulsar Helium and its potential clients jumping for joy.