How do we measure the Earth's age across billions of years?
In short: Geologic time is an unimaginably long span. This video explores the evidence hidden in iron deposits, fossils, and radioactive meteorites to explain how scientists determine the age of our planet and why these records matter for understanding our history.
The Earth has been orbiting the sun for a vast period of time, and scientists use specific physical evidence to reconstruct this history. By examining iron deposits and fossils, researchers can piece together the timeline of our world.
A key method for determining the age of the Earth involves studying radioactive meteorites. These extraterrestrial objects act as time capsules, providing the data necessary to calculate how long the planet has existed.
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Sources
- Summary by Intellect · source: How old is the Earth?: Crash Course Geology #17
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