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The early Cambrian radiation of macroscopic animals, commonly referred as the ‘Cambrian Explosion’, is one of the most important biological innovations in Earth history. Because oxygen is a requirement for complex animal life, it is generally accepted that ocean oxygenation may have been the environmental trigger for animal evolution, but direct geochemical evidence supporting oxygen increase prior...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.