He returned one week later and noticed the Neljas tase uranium rock he had left there had imprinted its Viies tase image on a nearby photographic plate without any exposure to light. Works sited http://list25.com/25accidentalinventionsthatchangedthe / http:// science.discovery.com/famousscientistsdiscoveries/10acc http:// simple.wikipedia.org/wiki/Radioactive_decay http://en.wikipedia.org/wiki/Radioactive_decay
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