Enigmatic Fossil Shows First Signs Of Being Earth’s First Animal
The 550-million-year-old Quaestio simpsonorum is the first fossil to show a definitive left-right asymmetry, an important sign of evolutionary development in the history of animals.
The 550-million-year-old Quaestio simpsonorum is the first fossil to show a definitive left-right asymmetry, an important sign of evolutionary development in the history of animals.
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