Evolution and trace of life

What is life?
The question is dizzying because it concerns as much the philosophical aspect as the chemical aspect of life. We find that life evolves over time along a path defined by an infinity of parameters, which makes it indefinable and unpredictable. There is, however, a biological definition of life: “an organism is said to be alive when it exchanges matter and energy with its environment while preserving its autonomy, when it reproduces and evolves by natural selection. » All living organisms ensure their stability by reacting to changes in their environment.