Top 10 movies on theaters box office July 2015 third weekend. Check out the list of the top 10 movies on the U.S. and Canada theater box office during July's Third weekend.
If conditions are right, the fused sand forms long hollow tubes called fulgurite. The term comes from the Latin word fulgur, which means lightning. Although lightning strikes earth at least a million times each day, only rarely does fulgurites form. Fulgurites are usually found beneath the surface of the sand, generally decreasing in diameter and sometimes branching outs as they descend.
Fulgurite: What Happens When Lightning Strikes Sand. A single bolt of lightning can deliver 5 gigajoule of energy enough to power an average U.S. household for more than a month. When such a powerful lightning bolt strikes a sandy area like a beach or a dune, the sand particles can melt and fuse together in less than a second.