I'm a freelance geologist working mostly in the Eastern Alps. I graduated in 2007 with a project studying how permafrost, that´s frozen soil, is reacting to the more visible recent changes of the alpine environment.
A team of researchers at the Universities of Tübingen and Göttingen has found that certain minerals with characteristic shapes could indicate the activity of bacteria inThe geological record shows that hot springs have existed on our planet for at least 3.77 billion years. Researchers consider that, due to their extremely dynamic physical and chemical conditions, hot spring systems may have given rise to organic substances and to the first life on Earth.
"In order to understand how life originated, we are following the evolution of microorganisms back billions of years. To do this, we are looking for traces of life, which we call biosignatures, in the oldest rocks on earth," explains Eric Runge, who conducted the research at the University of Tübingen.
It is not always clear whether structures or minerals in rocks are formed by the action of living organisms such as microorganisms or solely by chemical and physical processes."We are honing our search for biosignatures, gaining a better understanding of how biologically formed minerals change over long geological periods," Runge says. which is abundant in hydrothermal vents on the ocean floor.
In the absence of air, certain bacteria can grow and generate energy by transferring electrons from sulfur-compounds to oxidized iron. This is reduced andIn the experiment, the research team has now simulated how magnetite reacts chemically with the sulfur-rich fluids produced there.
"However, research into biosignatures is not relevant solely for deciphering the history of life on Earth," adds Jan-Peter Duda, another geomicrobiologist involved in the study."Hot springs, similar to those on the ocean floor, could occur. If there is life there, it is most likely to be microorganisms. Studies like ours provide the basis for recognizing the traces of such organisms."Our community is about connecting people through open and thoughtful conversations.
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