Defining Life Through Action

Traditional definitions of life often focus on characteristics such as reproduction, metabolism, or self-sustaining systems, but these criteria often fall short when considering exceptions like sterile mules. Astrobiologist Sarah Walker suggests that instead of attempting to define what life is, we should focus on what life does. This shift in perspective emphasizes the processes of life, rather than rigid classifications that can lead to inconsistencies. Walker’s insights indicate that understanding life’s actions may lead to a more meaningful comprehension of existence itself.