Great idea to provide a link. That may be necessary to keep handy,if it indeed becomes the challenge.I'm sure the question as to what it means will be asked over and over.Remember,there was even some question as to the meaning of 'liquid motion'! PS-I had no idea clouds were considered natural fractals.Not sure I get that one,but okay.That certainly makes it easy enough! ;^)

Marlene <")

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"A new study shows that licking the sweat off a frog can cure depression. The down side is, the minute you stop licking, the frog gets depressed again." - Jay Leno