What is life according to physics?

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Discussion Overview

The discussion explores the concept of life from a physics perspective, questioning the nature of life, the role of atoms, and the intersection of physics and biology. Participants examine whether atoms can be considered alive and what distinguishes living entities from non-living matter.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants question how life arises from atoms and what specific properties of atoms contribute to life.
  • Others assert that physics does not address the concept of life, suggesting that it is outside its scope and better suited for biology.
  • One participant argues that atoms do not meet the criteria for life, emphasizing that life is a complex concept often better described in terms of functioning cells.
  • Another viewpoint suggests that the information encoded in the arrangements of atoms is fundamental to the basis of life, indicating a perspective from evolutionary biology.
  • A participant notes that life may correspond to a process or flow that can be identified subjectively, highlighting the lack of consensus among physicists on the definition of life.
  • Biophysics is mentioned as an active field that engages with these questions, suggesting a connection between physics and biological processes.

Areas of Agreement / Disagreement

Participants express a range of views, with no consensus on the definition of life or the role of physics in understanding it. Some argue that life cannot be attributed to atoms, while others propose that the arrangement of atoms carries significance. The discussion remains unresolved with competing perspectives.

Contextual Notes

Participants highlight the complexity of defining life and the limitations of physics in addressing biological concepts. There is an acknowledgment of differing criteria for life and the subjective nature of identifying living processes.

benzun_1999
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dear readers,
everything in this world is made up of atoms. but how come certain things have life and certain thing don't have. do atoms have life like us? what is pecular about the atoms that cause life?
-benzun
no one is a expert other than god.who knows every thing?
 
Physics news on Phys.org
There is no "according to physics" here.

Physics quite intelligently avoids the question: it says "I have enough to worry about, go ask biology"!
 
Physics deals with interaction between matter and energy, not life.
 
benzun,
Life is a dicy concept. Even Biologists often find it more conventient to refer to "functioning cells" than "living cells". However, as to your question about whether atoms are alive like us, the answer is most assuredly "no". They meet none of the criteria that are used to determine life.
 
'It is not the atoms themselves, rather the information that is encoded in arrangements of atoms that is the basis of life.' At least this is the viewpoint of many scientists working in the fields evolutionary biology.

The question of how the concept of life fits into physics is a huge field of debate. For more info, I suggest you look up 'Artificial life' (or 'ALife) on google for a different perspective on the question of life, it is rather interseting, even if you do not quite agree with what is being suggested by the ALife movement.

The book 'Artificial Organisms' is also a very good read if you are interested in this kind of thing.

Claude.
 
'It is not the atoms themselves, rather the information that is encoded in arrangements of atoms that is the basis of life.'
That is close to my view, which is that life corresponds to a process, a certain form of complicated flow that we can subjectively identify.

But physics doesn't have an official line on this. Physicists disagree a lot over what life represents - as a brief look through the PF philosophy archives would show.
 
That doesn't prevent biophysics from having an active agenda:

http://www.biophysics.org/btol/
Biophysics Textbook OnLine

quart
 
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