Every marvelous living creature on Earth is built of complex living cells. Even the simplest bacteria have like over 100 genes and thousands of specified molecules. All these systems within the cell kind of intersect and are dependent upon one another. So most origin of life researchers look at this dazzling interconnectedness and think that the very first cell cannot possibly have been this complex.
How did life on Earth start? To help answer that, researchers are trying to create some life for themselves.
This is the second episode in our three-part series, Origins, about the beginnings and boundaries of life on Earth.
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