Did mammoths scratch themselves against rocks?
Parkman believes, and he has a growing body of evidence to prove that mammoths and other large Ice Age creatures once used these very rocks near Duncan's Landing, along the Sonoma Coast State Beach, to scratch their backs. He claims the giant mammals rubbed so much that large swaths of rock have been buffered smooth.
Bears scratch against the trees, but which species is which? Lumpers vs. Splitters.
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The other day, my better half and I were discussing scratching. Predictably, in the course of the discussion, I became aware of every itchy square millimeter of skin I might possibly possess.
Scratch Programming Playground: Learn to Program by Making Cool
Last October I reviewed Scratch Programming Playground, by Al Sweigart.
I already went over a Monte Carlo method for estimating Pi - you know, for Pi-Day (March 14). Well, here is a small addition. This is the same thing done in Scratch.