Looks like PLANTS ‘evolved’ first; then, when they had produced enough oxygen, we mobile life forms came around.
https://globalchange.umich.edu/globalchange1/current/lectures/Perry_Samson_lectures/evolution_atm/
(Do NOT ask me just HOW this was supposed to have happened.)
“(Do NOT ask me just HOW this was supposed to have happened.)”
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According to the liberals, it was just some random collection of organic material that massed together ON ITS OWN, much in the same way a baby is developed. Or a fetus. Or a gathering of human-type cells. Why plant cells and human cells aren’t mixed together remains a mystery. /s