Ad: Higher Order Evolution Begins Adequate Amt Oxygen Apron
Ever wondered how much oxygen in the atmosphere existed during the Cambrian explosion or around the Permian-Triassic extinction event? Wonder no longer and showcase your evolutionary sense of humor with this all-over print apron featuring the relative oxygen content of Earth's atmosphere during the course of the last billion years. Caption says it all: "Higher Order Evolution Begins With An Adequate Amount Of Oxygen". Make others do a double-take about how oxygen levels and evolution impacted each other with this educational scientific saying all-over print apron! myEvolution
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