Atom probe assisted dating of oldest piece of Earth

It’s a scientific axiom: big claims require extra-solid evidence. So when a geoscience professor dated an ancient crystal to 4.4 billion years ago, skeptics questioned the dating. Then, in 2013, researchers put the zircon inside an ultra-precise atom probe and got “data that answered the most serious of the challenges going back to 2001.”

from Physics News — ScienceDaily http://ift.tt/1msgpu7

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