OK OK Yes, planets are reservoirs of chemistry and chemical reactions to provide those "footings". Not all planets qualify for the term Cinderella planet. But Earth has undergone some 2 trillion, quadrillion, quadrillion, quadrillion (2 x 10 ^54) chemical reactions during its lifetime. Can't ever match that in a lab......Please Register or Log in to view the hidden image!. No wonder we have the variety of life in all species, everywhere. We got Air, Water, Minerals aplenty Start the clip at 25:10 to avoid lenghty introduction. Actually we have a pretty good idea, it's just that we are speaking about nano-chemistry and polymerization and at that level experiments become complicated and difficult to monitor. Watch the Hazen lecture. It touches on a lot of things. One interesting point is that life on earth only uses some 500 different biomolecules. Which is a very small number of fundamental types of molecules compared to the number of cells which run into the millions.