He came to the conclusion that lead in our surrounding environment - especially from the exhaust of vehicles burning leaded gasoline - was not only hindering his research but represented a toxic poison threating humans and animals alike.Īfter years of battling the petroleum industry - which claimed lead in the environment came from natural, not man-made sources and tried to dismiss Patterson as a crank - Patterson's undeniable scientific results led to a move in the United States to ban lead in products including gasoline, paint and many canned goods. His research was not without hurdles, the fact that his measurements of the lead content before he created his clean room, differ wildly from one experiment to the next. Knowing the amount of lead in the meteorite, the age of which had previously been determined, Patterson was able to put the age of the earth at around 4.5 billion years. "He had built the world's first ultra-clean room," Tyson said during the episode. Among the "firsts" he created in his research was the first "clean room" now so familiar in many research fields.
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