@Zetherin,
Zetherin wrote:What defines living? We don't even have a universal definition.
I hope the definition below may be usefull:
a-
What is the scientific definition of "living"?
Professor Steven Rose in The New Penguin English Dictionary writes: " The characteristic of
living organisms include the capacity to maintain a constant internal environment, to respond to and transform their external environment, to grow and develop, and to self-replicate, producing more or less identical copies of themselves. Living beings are thermodynamically open, driving energy from their environment in order to sustain and transform themselves, a process known as autopoiesis, or self-creation".
b-
How living come about?
I think the molecular biologists are probably the best people to answer these question. My rudimentary knowledge is:
During the history of the universe [and our planet earth] the change [by
mutation] of molecular structures of the basic ingredients of
inanimate chemicals [substance] have created
animate substance [living organism]. And from the most basic animate form/substance [again with mutation and evolution combine with constantly changing external conditions] we come to where we are today.
I am not aware of any animate substance created by human beings yet.
Regards,
democritus