The living dead
May 18, 2001 | Source: New Scientist
A cybernetic definition of “life” has been proposed by Bernard Korzeniewski of the Institute of Molecular Biology at Jagiellonian University in Kraków, Poland: “A network of inferior negative feedbacks subordinated to a superior positive feedback.”
In other words, life is a system that tries to regulate itself to preserve its identity. Uner this definition, ants, prions, and infertile humans are not alive, but parasitic DNA is, he says.