The film is frequently cited by NASA as one of the most scientifically inaccurate movies ever made. Unobtainium:
To save humanity, geophysicist Dr. Josh Keyes and a team of "terranauts" board the
They travel in the Virgil , a subterranean craft made of " unobtainium "—a fictional metal that converts heat and pressure into energy, becoming stronger as it descends.