Word: dunes
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...question about a bomb and suddenly he's Mr. Wizard, spouting off details about detonation wires and weird timers. He seems to be in constant analysis mode. And the gear the LAPD folks wear is really cool--black and futuristic, a cross between battle armor and the suits in "Dune." They look like they can handle anything...
...headed towards the top of the main dune and the air temperature dropped perceptibly as we gained altitude. We summitted the dune and peered over, a magical Algerian land-scape stretching below. I started to think wildly about that movie "Lawrence of Arabia," and in a moment of glory I cracked open my Bud Lite...
...Holy smokes! AHHHHHHHHHHH! Run!!!" I screamed as I gave myself up to my fight-or-flight mode. Faced with the prospect of watching a real fiery aeroplane crash, I leaped and tumbled down the dune, screaming in terror. In an instant we found ourselves at the bottom of the dune in a heap, huddling in morbid anticipation of the impending explosion that would spray bits of blazing metal to all corners of the idyllic North Shore...
Some MUDs are fashioned after medieval villages, with town squares, blacksmiths and churches. Others re-create science-fiction and fairy-tale settings, like C.S. Lewis' Narnia, Frank Herbert's Dune and the universe of Star Trek. Massachusetts Institute of Technology researchers have built a MUD model of their famous Media Lab, with offices and corridors corresponding to the real thing. One intrepid group of computer users constructed a section of the London Underground, complete with a virtual subway. MUDs come and go, drifting in and out of favor, but the current count is estimated at 300 worldwide, most of them...
...easiest examples to understand is sand dunes, which maintain their overall shape despite winds and sandslides. Researchers at IBM's Thomas Watson Research Center built an artificial dune, a tiny sandpile sitting on a sensitively balanced plate, to study this behavior in detail. In one experiment, they dropped 35,000 grains of sand onto the pile one by one. As the sides grew too steep -- in some cases, by only a single grain of sand -- avalanches would make the pile collapse. Then it would start growing steeper again, until it was time for the next avalanche...