Study uncovers potential origins of life in ancient hot springs
Newcastle University research turns to ancient hot springs to explore the origins of life on Earth
Scientists at Newcastle University found that mixing hydrogen, bicarbonate, and iron-rich magnetite under conditions mimicking relatively mild hydrothermal vent results in the formation of a spectrum of organic molecules, most notably including fatty acids stretching up to 18 carbon atoms in length. The Natural Environmental Research Council of the United Kingdom provided funding for the research team, which examined how the Earth's first life systems formed from inert geological components over 3.5 billion years ago.
Their discoveries, which were published in the journal Nature Communications Earth & Environment, may clarify how some important molecules required to generate life are derived from inorganic substances. This knowledge is crucial for comprehending an important phase in the formation of life on Earth billions of years ago. Their research could offer a believable explanation for the origin of the organic molecules that make up ancient cell membranes, which were possibly picked at random by early biochemical processes on the primordial Earth.
Dr Graham Purvis, the study's lead author, is a postdoctoral research associate at Durham University and carried out the research at Newcastle University. He said, “The results suggest that the convergence of hydrogen-rich fluids from alkaline hydrothermal vents with bicarbonate-rich waters on iron-based minerals could have precipitated the rudimentary membranes of early cells at the very beginning of life.”
Fatty acids in the early stages of life
Long chemical molecules called fatty acids have sections that both attract and repel water. As a result, these molecules would naturally form cell-like compartments in water, and these molecules may be the source of the first cell membranes. However, in the early stages of life, the origin of these fatty acids remained unknown, despite their significance. One theory is that they may have developed at the hydrothermal vents, which are areas where hot water and hydrogen-rich fluids from underwater vents combine with CO2-containing seawater.
