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Monkeys, Hedgehogs and Foxes
As part of our discussion, y'day, on what/why/how to teach evolution to elementary, middle and high school students, I shared a final project made by a student in this class a number of years ago. It's called "My Great Grand-daddy was a Monkey." Enjoy (or, Hope, correct)!
Also, as part of our discussion of how "large" the scope of a K-12 science classroom should be--how much historical, cultural, social context should be provided?--as well as to organize some of our observations about how different brains make sense of things, I mentioned

Why Don't Horseshoe Crabs Evolve?
We were talking in class today about how random change is inevitable in a species, and how changes are "selected" by the environment and thus end up being found in future generations. That's well and good, but we have a problem: horseshoe crabs (someone also mentioned alligators in class). Horseshoe crabs have been around for half a billion years, at least, at haven't really changed since them. Why, if random change is inevitable, have certain species (seemed to) have avoided it?