So what are they, exactly? Basically, they are natural tubes of glass that are formed by a fusion of silica sand or rock during a lightning strike. Much like Lichtenberg figures appear across wood ...

From my understanding there was a lightning strike not too far away, which most likely hit the sand, and sand conducts electricity very well,' he said. '(The electricity) went through and his body ...

“When lightning strikes a tree, the ground typically explodes out and the surrounding grass dies, forming a scar and sending electric discharge through nearby rock, soil and sand, forming ...