In 1993 , geochemist Michael Russell proposed a mechanism by which life could have started on Earth as long ago as 3.5 billion years He proposed that life came from harnessing the energy from gradients that form when extremely alkaline water mixes with more acidic seawater . This proposal BEST describes which origin of life theory ?
At the time of life's origin, the early ocean was acidic and filled with positively charged protons, while the deep-sea vents spewed out bitter alkaline fluid, which is rich in negatively charged hydroxide ions.
