What is the Last Universal Common Ancestor (LUCA)?

Luca-The last common ancestor of all species before differentiation.

LUCA

(Common ancestor of all biological species)

Right!

Luca-The last common ancestor of all species before differentiation.

The original LUCA is The Last Universal Common Ancestor, abbreviated as LUCA

What does LUCA look like? Where do you live?

The traditional answer is: it looks like a bacterium and lives in a warm pond near the hot spring, or in a shallow bay. However, in the past few years, a more fashionable approach has been to provide Luca with a more dangerous environment, because it has become increasingly clear that there are hundreds of millions of chemical substances on the rocks underground and under the sea. bacterial.

It is now generally believed that Luca exists very deep underground, in cracks in igneous rocks, and eats sulfur, iron, hydrogen, and carbon for a living. To this day, the creatures living on the surface of the earth are still only a thin layer of all the creatures on the earth. The thermophilic bacteria deep in the ground-maybe the substances that make up natural gas-the total amount of carbon in the body, maybe ten times the carbon content of all living things on the surface of the earth.