There is one only real mistery still left about life.

It is the first entity capable of auto replication but simple enough to be the result of the mere chance
No bio chemist , nowadays, can even figure out something like that
Even the simplest living entities , for example some bacteria living in protected enviromentals , some hundred meters under the ground are so complex that they can not have been the first living creature
There are many hyphotesis but none of them is satisfactory
On the the contrary the theory of evolution is full deterministic and well documented
Once you have got such primordial entity and bilion years the evolution of the species is a natural consequence