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video: how do we figure out that rocks are billions of years old?
age of earth
earth science
geology
isotopes
radioactivity
radiometric dating
science
technology
source
the north pole moved to the north pole in a single human lifetime
geology
magnetic field
magnetic reversal
radiometric dating
scientific method
technology
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using radioactive krypton to find ancient glacial ice
antarctica
climate science
glaciers
ice cores
radiometric dating
scientific method
technology
source
the oldest piece of the earth, examined atom-by-atom
early earth
geology
radiometric dating
scientific method
technology
zircon
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riding the bomb curve to find the age of a tooth
radioactive dating
radiometric dating
scientific method
technology
wildlife
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