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Metabolism: not the limiting factor in prokar

“One of the great mysteries of biology,” says Eric Libby, former SFI Postdoctoral Fellow, now an associate professor at the Integrated Science Lab (IceLab), Umeå University in Sweden, “is eukaryogenesis, or how eukaryotes arose.” Scientists consider this to be a period of major evolutionary transition, critical to our understanding of the history and evolution of life on Earth.
United States Christopher Kempes Eric Libby Arizona State University Proceedings Of The National Academy Sciences Science Lab Icelab

Did Earth's early rise in oxygen help multicellular life evolve?

Credit: NASA Scientists have long thought that there was a direct connection between the rise in atmospheric oxygen, which started with the Great Oxygenation Event 2.5 billion years ago, and the rise of large, complex multicellular organisms. That theory, the "Oxygen Control Hypothesis," suggests that the size of these early multicellular organisms was limited by the depth to which oxygen could diffuse into their bodies. The hypothesis makes a simple prediction that has been highly influential...
United States Georgia Institute Of Technology New Mexico G Ozan Bozdag Rozenn Pineau Eric Libby

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