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"Fundamental Assumption" in Zircon Dating Called into Question

A commonly-used dating method has been threatened by new findings that undermine assumptions.

The Trouble with Zircons

Geologists' favorite tool for dating rocks at millions and billions of years old has revealed problems with interpretation.

Planetary Radiometric Dates 1/3 Younger

The half-lives of radioactive isotopes may not be as well-known as thought. One decay rate frequently used to date solar system objects had to be adjusted down to 66% of its former assumed value, impacting theories of planet formation.
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