Upon the creation of the first living cells (or even if those
cells landed here from elsewhere in the cosmos) those cells had
to ingest or absorb some kind of life supporting sustenance. If
the cells didn't start eating each other right from the start
(predator and prey system), and if these cells couldn't absorb
nutrients from the ground (a root system) then all that was left
for sustenance was water and the sun.    1. Could a living cell
thrive on just oxygen and hydrogen, along with nutrients from
the sun?   2. Are there any life forms today that are surviving
on just these three sources?