We must understand the origins and principles of life to be able to search for extraterrestrial life on other planets. This knowledge can be gained through techniques such as monitoring atmospheric biosignatures and searching for signs of habitable places.

This means that living systems are composed of complex molecules that are capable of self-reproduction and adapting to changing environments over time.

From a biophysical perspective, living beings are understood as thermodynamic systems that can self-organize and reproduce in a way that is responsive to changes in their surroundings. This means that living things are able to maintain a state of low entropy, or disorder, by constantly exchanging energy and matter with their environment.

Another important aspect of the chemical definition of life is the ability of living things to store and transmit genetic information. This information is generally stored in the form of DNA or RNA, which are complex organic molecules that contain the instructions for building and maintaining living systems. The ability of living systems to store and transmit genetic information is essential for reproduction and evolution.

Life is the sensation of being alive, involving irrational perceptions, feelings, and interactions.