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Age of the Earth

3:45

Four ways to understand the Earth's age - Joshua M. Sneideman

3:20

Evolution of Earth Timeline : From the Birth of Earth and Beyond

2:28

COSMOS A SpaceTime Odyssey | Age of The Earth

2:49

World’s Most Asked Questions: How Old is Earth?

2:53

How do we know The Age of The Earth?

The age of Earth is estimated to be 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%). This age may represent the age of Earth's accretion, or core formation, or of the material from which Earth formed. This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.
    • Development of modern geologic concepts 

    • Early calculations 

    • Overview 

    • Convective mantle and radioactivity 

    • Invention of radiometric dating 

    • Arthur Holmes establishes radiometric dating 

    • Modern radiometric dating 

    • Why meteorites were used 

    • Canyon Diablo meteorite