Earth was inhospitable to complex life for billions of years, practically suffocating evolution in a nearly oxygen-free environment. Then came a shift in phosphorus concentrations to ocean shallows, and after …read more
Source:: Science
Earth was inhospitable to complex life for billions of years, practically suffocating evolution in a nearly oxygen-free environment. Then came a shift in phosphorus concentrations to ocean shallows, and after …read more
Source:: Science