How do we know the age of the Earth?
5:54
YouTubeMatt Parker
How do we know the age of the Earth?
The Earth is 4.54 billion years old, but how did scientists figure this out? In this video, I answer that question. Sources: Radiometric Dating: http://pubs.usgs.gov/gip/geotime/radiometric.html#table http://en.wikipedia.org/wiki/Radiometric_dating Age of the Earth: http://geomaps.wr.usgs.gov/parks/gtime/ageofearth.html http://en.wikipedia.org ...
116.7K viewsJul 18, 2014
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