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Rubik's Cube Now Solvable in 20 Moves
A few years ago we reported that it had been proven that Rubik's Cubes could be solved in 23 moves. Well now that number is
down to just 20. Proving it required 35 years of computer time donated by Google to get it done.
I know it won't stem the tide, but this is good research. I'm sure there are a million other algorithms in the world that can benefit from this. Shortcuts they had to invent to make sure they were using minimal processing time, full understanding of how much money and time it really took to get this process done to make other projects more practical, etc etc. This sort of thinking, even if silly on its own, has a broad range of applications.
If you've got a computational problem that would help towards a cancer cure, have you asked Google to donate time for it?
No, he'd rather just complain. It's much easier to criticize researchers than to do the research yourself.
I wouldn't say they're cheating, but I am a bit dissatisfied with their way of counting moves. Rotating a face by 180 degrees is not an elementary move to me. I'd like to know god's number in elementary moves.
Unzipping a fly with one hand is a bit like tying shoes.
You’re an expert at tying shoes? Now go try tying someone else’s shoes.
Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
More and more women are going braless, or are wearing a sports bra. Gone are the days of the hooks.
Bearded Dragon
There's a movement in health research now geared at extending what they call "healthspan" rather than just "lifespan" -- not "how long does this dude keep breathing", but "how long can we keep this dude active and happy"?
Turns out that many of the things that make people live longer also make their late years healthier. My grandfather is 94 and still travels the world with his girlfriend (a spry young 75, but he'll never see her again now that she's taken up Farmville). He got prostate cancer a few years ago (and colon cancer a few decades ago), received aggressive treatment for it, and is now cancer-free and healthy.
Old does not *have* to mean feeble. Sometimes it does, of course, and that's bad; this is why we should look at healthspan rather than lifespan.
Indeed... once you pop one of the corners out with a flathead screwdriver, the rest come out pretty easily. The bad part is that after a few times doing this, the plastic becomes a bit worn and the edges won't hold the cubes in as well. It becomes patently obvious that the cube has been disassembled; a few more times and the cube starts to fall apart when turned and twisted normally. Or maybe I just got cheap models as a kid.