We can’t yet tell how life got its start on Earth. That’s one great reason to keep looking for life elsewhere
Given the enormous interest in these questions, you might expect that the basic concepts would be settled by now. But in fact, many ideas about crucial aspects of life are plagued with uncertainties and misconceptions. Before we can even crudely estimate thefamous 1952 experiment by chemists Stanley Miller and Harold Urey
Another theory frequently publicized in popular science publications is that life on Earth began at relatively low-temperature hydrothermal vents at the bottom of the ocean. Those vents are known to release plumes of alkaline water into the more acidic ocean water, providing a source of energy that is often efficiently harvested by abundant life at the vicinity of these vents.
Finally, the origin of life seems to have required various chemical processes to have occurred at different locations and times, to only then come together in the right order. These conditions could have been achieved in small lakes and ponds on the Earth’s surface, where geothermal heat and wet-dry and freeze-thaw cycles could have created the required variety of conditions, but not at deep-sea locations.
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