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Return of Son of Links

* Most Americans don't expect the economy to recover. Which has some effect in making the economy not recover. Can the US imitate Japan's 20 years of stagnation? Yes we can!
http://finance.yahoo.com/news/More-Americans-Think-Economy-cnbc-3492482385.html?x=0&sec=topStories&pos=main&asset=&ccode=

* Why airships suck. Starts with some history, like the 1783 "balloon race" in Paris, won by people who knew a guy who made illegal condoms.
http://www.scientificamerican.com/blog/post.cfm?id=helium-hokum-why-airships-will-neve-2011-05-27
http://www.ingenia.org.uk/ingenia/issues/issue22/imperial.pdf



The vertical axis has confusing units; they simplify to energy/(distance*weight). If you assume a fixed distance, it's just energy/cargo weight. So moving down is more energy efficient for moving a cargo, at the same speed; moving to the right is faster, for the same efficiency for the whole trip. (By usual standards of energy efficiency, including speed, much more efficient.) Trains are nearly as efficient as boats, and much faster, which is why we don't use canals. Planes are as efficient as airships, and much faster. Helicopters are probably in roughly the same space as airships, but have other advantages like flexibility. Airships might have a niches as luxury liners, forfeiting speed but embracing the advantage of being able to not move at all, or slowly. But there seems little call for cargo airships: planes are as efficient but faster, trains can be nearly as fast but more efficient. Large classical airships are more efficient than planes, so if fuel costs went up a lot there might be a use for them in transoceanic travel, but it looks like a delicate balancing act to not be pushed to planes (only 2x more cost, much faster) or boats (1/10th the cost, though slower.)

* cuttlefish can mimic pictures
http://news.nationalgeographic.com/news/2011/06/pictures/110601-cuttlefish-camouflage-science-gestures-arms-mimic-nature/

* About 1 in 3 US Presidents died in office. We were killing one every 20 years until the Secret Service got a job. http://www.filibustercartoons.com/prezidents.htm
Bush didn't veto many bills. Here's what he did: http://www.filibustercartoons.com/bushvetoes.htm
Female leaders around the world. South America is way ahead of North. http://www.filibustercartoons.com/charts_rest_female-leaders.php

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