we are alone.. i agree with mike.. according to darwin's evolution theory;

First the singe cell organsisms were created by the condensation of methane, oxygen, ammonia... then from the energy from the sun the the single celled organisms formed complex organisms (not more complex than current living begins) known as coacervates.. then from these coacervates evolution started..

now tell me, how can the same thing happen in another place... billions and trillions away from here... the same conditions???? nah....