“Understanding how organisms here have changed with time and in different environments is going to teach us crucial things about how to search for and recognize life elsewhere,” one astrobiologist explained.
Scientists believe microbes on Earth can help unlock what life was like during the planet’s early stages and this information could potentially help them recognize signs of life on other planets. observed rhodopsin proteins in microbes from all over the world and created a family tree of sorts to distinguish the type of environment archaea lived in billions of years ago.
But ever since the Great Oxidation Event over 2 billion years ago, modern microbes have evolved and are able to absorb many colors of light. Who’s to say this isn’t happening or could happen on planets circling a distant star not too different from our own? will lead the way to potentially helping scientists understand what, if any, life there could be on Earth-like planets or moons in the universe.
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