The First Life on Earth: Meet LUCA

Scientists now believe that the very first ancestor of all life on Earth, known as the Last Universal Common Ancestor (LUCA), lived around 4.2 billion years ago. This tiny single-celled organism appeared just a few hundred million years after Earth's formation (surprisingly soon) and was more complex than previously thought. These new findings change how we understand the origins of life on our planet and open up exciting possibilities for finding life beyond Earth.

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