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Comment Re:Must past this test (Score 1) 508

3. You get bored, distracted, and fall asleep behind the wheel ... especially on long straight highways. 4. You are limited in how many hours per day you can drive. 5. You are expensive. This is why the premier application (note I did not use the term "killer app") for self-driving vehicles will be in long haul trucks.

Comment Don't do this. (Score 5, Interesting) 589

Long ago, I worked at a commercial lab where tanks of H2, 02, and N2O (nitrous oxide) were used for flame or plasma ion detectors. For fun, we used to launch "Hindenburgs" ... large trash bags filled with hydrogen plus a latex glove filled with the oxydizer and trailed by a fuse of burning paraffin film. The balloon would sail off into the night sky and detonate at a safe altitude and distance downwind. Usually. Our antics abruptly halted when one exploded prematurely just a dozen feet off the ground. The concussion and heat convinced us to give up our fun.

Comment Self Portrait? (Score 1) 94

Can this tell us something about the shape of space? The fabric of space could form a loop such as a sphere. Think of the arcade game Asteroids. I have wondered if the Hubble deep field images are something like a self portrait photo shot in a very large house of mirrors. The loop is so big, in fact, that we are seeing our own galaxy and all others repeated at intervals of time in the past. The minimum homogeneous volume would also place a lower limit on the size of the loop.

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