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Due to its reactivity free oxygen is extremely rare in nature and would not exist on Earth without the process of [[photosynthesis]]. Geologists and evolutionists believe that free oxygen first appeared during the "Great Oxygenation Event" around 2.4 billion years ago. Due to the extreme claimed age of this event the hypothesis is generally rejected by Creation scientists.
Due to its reactivity free oxygen is extremely rare in nature and would not exist on Earth without the process of [[photosynthesis]]. Geologists and evolutionists believe that free oxygen first appeared during the "Great Oxygenation Event" around 2.4 billion years ago. Due to the extreme claimed age of this event the hypothesis is generally rejected by Creation scientists.
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