Extraterrestrial life may look nothing like life on Earth so astrobiologists are coming up with a framework to study how complex systems evolve
Briefly

"NASA defines life as a 'self-sustaining chemical reaction capable of Darwinian evolution.' This overview attempts to encapsulate the core characteristics that could apply to life beyond Earth."
"Astrobiologists continue grappling with the definition of life, as their understanding evolves. Some researchers argue that creating a definitive definition may not even be possible, which complicates the search for extraterrestrial life."
Read at Inverse
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