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Bob Libra
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80!

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90 years ago today Charles Lindbergh landed in Paris, after a 55-hour solo flight from Long island. Sometimes at speeds above 100 mph (!).
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About 20 years ago a staffer from the Minnesota Pollution Control Agency called and asked me to attend a meeting they were setting up. "We're reviewing our rules on karst and manure, and your name keeps coming up". We all have our claim to fame............

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Deep into the negotiation, a deal was struck. 
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We have a small pond in the backyard, and the Mallard family has taken up residence. Yesterday the kitty went down to investigate and was greeted by more noise than a republican congressman at a town hall. He was pretty much told to Quack Off or Die, and retreated to the house. This evening I step out on the back porch and daddy duck comes over the house low and fast (fast!) and just plops on the pond. Great landing. This is getting interesting, although I fear Kitty hasn't read Make Way for Ducklings ;)
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This has me channeling Eddie Murphy in 48 Hours ~ ~ ~ 
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A couple of photos while traveling to a meeting in Wisconsin. The Mississippi River from atop the bluffs in Lansing Iowa, and the northern edges of the "Driftless Area" near Eau Claire. The landscape is all cut into Ordovician and Cambrian strata, with more sandstone as you head north. Silica-pure sandstone, that is. The meeting was an AIPG session on Frack Sand, most of which, and the best of which they say, comes from the upper Mississippi Valley.

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5/12/17
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The real reason humans feed birds. 
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Just in time for Physics Phriday. Electrons are so hard to keep an ion ;) 
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