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At only between two and three million years old, local cave rock could not be dated using the uranium-lead technique. Black escorts north Regina substances younger than 50 years, radiocarbon dating is used. Naturally-occurring radioactive uranium is locked into rocks as they form, and starts decaying into lead almost immediately.
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Pickering earned her PhD by adapting uranium-lead dating to South African circumstances. The big picture is very important, as is the collaboration between everybody working on a fossil site. Married and with two small children, I am aware that I can be a positive role model for young women.
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