Tag Archives: Arthur Holmes

Going on Four (Billion)

A paper published last week in Nature, claims that life began at 3.7 (billion years ago). This is the latest in a rather faltering progression of our best guesses of the date life started on Earth. Biblical literalists are still … Continue reading

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Wegener’s Death and Drift’s Hiatus

Over the past few days, I’ve written about Alfred Wegener’s continental drift theory, which is celebrating its 100th year as a spunky idea that explains a lot of our geology. From mountains to earthquakes and deep sea rifts to island … Continue reading

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The Billion Year Discovery

About a century ago, a college student figured out that the Earth has rocks over a billion years old. Until Arthur Holmes’ experiments at Imperial College in London, geologists could only guess at the age of various rock formations. Geologist … Continue reading

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