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The Magnetic Sled and the Explosion of Hiroshima
Hiroshima fireball released a few percent of the Hiroshima atomic bomb energy. Scientists used magnetic sled to lift material from ocean floor and filter it out with vacuum cleaner. They were looking for spherals, which are molten droplets that melt from surface of meteors as a result of extreme heat. The team was able to find particles bigger than a quarter of a millimeter in some areas.