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JACK HILLS ZIRCON
A 4.4-billion-year-old Zircon grain found in Western Australia may reveal how early earth took shape – The oldest known terrestrial mineral grain offers clues about earth’s first crust, surface water and the moon’s formationA zircon crystal found in Australia, dating back 4.4 billion years, indicates that early Earth was likely to have been covered in water. Ad...- Earth's magnetic field much older than previously thoughtEarth's magnetic field is at least four billion years old, much older than the previous estimate of 3.45 billion years, scientists have fou...
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