Mount Etna in Sicily, Italy has been drawing attention over the last week as what appear to be “volcanic smoke rings” rise over the island volcano. Locals have reported seeing these rings since April ...

Some of the world's most important discoveries - penicillin, vulcanized rubber and Velcro, to name a few - were made by accident. In fact, it's been said that upward of half of all scientific ...

The process of vortex ring generation and propagation has received substantial treatment in the literature. A common ring generation geometry consists of a piston moving through tube that exits into a ...