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The benefits of owning a sailboat (with footnotes)

While perusing the Practical Sailor website, my husband came across this advertisement selling a 27-foot sailboat for $5000 (or best offer):

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Who are these crazy people out chasing tornadoes?

National Geographic News has an interview with Tim Samaras — an engineer, a scientist who studies severe storm systems, and a tornado chaser. Not all chasers are professionals like this. For many people, it's a hobby often motivated by a desire to help keep other people safe. Personally, I see a lot of similarities between hobbyist tornado chasers and the HAM radio folks — in fact, there's a lot of overlap between the two communities. And, as Samaras explains, if you want to get involved, there's training you really ought to do first. Maggie

Machines that do nothing but switch themselves off

Useless machines are home-built devices that turn themselves off as soon as you turn them on — and that's it. That's all the they do. The more elaborate and gimmicky the method by which they accomplish this job, the better. As a hobby, useless machines have been around since the 1950s, but Abigail Pesta of the Wall Street Journal says they're making a comeback. Maggie