![]() ![]() 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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