Gravity.

Giant globules of molten rock are defying the laws of physics by floating up out of an ancient glacier in this science fiction mystery.

They create a huge spiral tunnel down into a dormant volcano, and Geophysics instructor Alex Cave and his friend O'Conna descend deep into the mountain to discover the cause. What they find is more powerful than a nuclear weapon.

Janice Sloan, a ruthless woman dealing in stolen technology, manages to steal the device and takes it into the Nevada desert, but s...