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 formation

A zircon crystal found in Australia, dating back 4.4 billion years, indicates that early Earth was likely to have been covered in water. Additionally, lunar samples reveal that the Moon underwent a crystallization process reaching 99% completion around 4.43 billion years ago. These remarkable discoveries shed light on the intense geological changes that shaped both Earth and its lunar companion during the formative years of the solar system.

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