The defining feature of life.

When the mars rover and other exploratory missions set out to find life on other planets, what is it exactly they are looking for?





Faces in the landscape


The list above has yielded very little insight into life on other planets.

How do we find life? what does it mean to be alive?

This has lead to a shift in how astrobiologists try and find life on other worlds. They now look for the chemical signature of life. They look for metabolites. They search to see if metabolism took place here. They look for the products of the TCA cycle and maybe one day their analogs. CO2 may very well be more insightful than O2 when searching for something that yields energy the way we do.

Oxygen, water, and a face are not necessary to be alive. The ability to pass along protons in a sequential manner is.

Metabolism is the defining feature of life and we are damn lucky to get to learn about it.

Best in studies & health,


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s