The case that maybe life is just undefinable. To be or not to be, that is the question. Carl Zimmer has just been hurting my brain. I have no idea what life is. No one does. And there's no perfect circle around what's alive and what's merely life like. Maybe we can be thinking about living things as these things that are connected by family resemblances.
For every definition of life, there’s a creature that sends us right back to the drawing board.
This is the third episode in our three-part series, Origins, about the beginnings and boundaries of life on Earth.
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