Clean Rooms and Lead
The establishment of clean rooms revolutionized scientific research, allowing for precise measurements free from contamination. Through meticulous testing, it was revealed that lead, a potent neurotoxin, was present in alarming amounts in surface water and ice, a phenomenon that emerged suddenly in the 1920s. This discovery not only solidified the age of the Earth at 4.55 billion years but also highlighted the pervasive issue of lead pollution in our environment.In this clip
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