Thorium was a material used as an explosive, and would burn longer than baradium. However, it was rather hard to find. Thorium decayed, and this decay, when occurring within a planet, heated the rock of the planet's crust.
Thorium was a material used as an explosive, and would burn longer than baradium. However, it was rather hard to find. Thorium decayed, and this decay, when occurring within a planet, heated the rock of the planet's crust.