UCR Today (press release) | Oxygen Levels Delayed the Appearance of Animals Laboratory Equipment Geologists are letting the air out of a nagging mystery about the development of animal life on Earth. Scientists have ... “In other words, Earth's atmosphere couldn't have supported a diversity of creatures, no matter what genetic advancements were in ... Lack of oxygen delayed the rise of animals on Earth Oxygen levels were only 0.1 percent of today's levels for roughly billion ... Why Didn't Animals Appear Sooner in Earth's History? |
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