One of my favorite shows these days is Mythbusters, where two special effects guys try to test out urban legends. Last year, they tested a historical tale from the Roman era that said Archimedes - the Greek philosopher - created a large magnifying mirror and managed to ignite Roman warships coming into port with the power of the sun. The Mythbusters tried it and "busted" the myth, by proving themselves incapable of even getting a model ship warm with an array of mirrors under the San Francisco sun.
Well, some students/profs at MIT decided to try it for themselves and claim to have proven it feasible! With a huge number of reflective tiles, they managed to ignite a ship of their own... after quite a bit of work. Not sure the Romans would have been as patient as MIT's model, but it an experiment worth reading about.
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