#3205: Carbon Dating
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Transcript
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[Ponytail, standing, is pointing at a blackboard containing a drawing of a skull and some bones/bone fragments, as well as a graph and some lines of text. She is speaking to Cueball and Megan, who are standing beside her.]
Ponytail: The high carbon content of the skeleton indicates that the individual lived less than 13.6 billion years ago, after the first round of stellar nucleosynthesis.
[Caption below the panel:]
Cosmologist carbon dating
(Sourced from explainxkcd.com)
Title text:This dating is corroborated by the presence of stone tools at the site, rather than earlier and less effective helium ones.