If one would wish the briefest of intros to the concept of Valanga--Valanga, a landslide caused by a volcano. (These landslides are so full of good soil that the area around volcanos is notoriously good for growing food.) Vulcan, the god of fire, the element whose discovery was such a boon to history. Vesuvius is the first known eruption, and wiped out the city of Pompei, which has now been reestablished.
Note to all visitors, these valanga webpages have hosted a great deal of content; the site is being restructured so that it wll be suitable for a universal audience. It developed out of a series of initiatives inspired by various events. Accordingly, some of the material may not make sense at this time. In the meanwhile, your indulgence is appreciated.