There is no limit to how long humans can live—if we’re anything like machines.

At least, that’s what two biologists from the University of Chicago in Illinois theorize. Leonid Gavrilov and Natalia Gavrilova are known for applying reliability theory to aging, which they first proposed in two scientific articles in 1978.

Writing in an engineering publication, the researchers note how a consequence of their theory is that there’s no fixed upper limit to human longevity

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