It is probable that life originated only once, at least on our planet

stigWeard's Theory of Pan-Galactic Ecosystems states that in years to come we will find that ecosystems will encompass entire solar systems, and probably even entire galaxies.

Planets are seeded by metorites and comets, with planetary bombardment being the main mechanism for creating these meteorites, which then land on nearby worlds, spreading microscopic life forms that happpend to be on the rock that was blasted off the originating planets surface.

Given the tenacity and resilience of life (look no further than that for a true miracle!), it is entirely possible life is zooming around the cosmos, evolving into myriad forms we cannot even imagine. With luck, one day some lucky folks will get to go and discover all these life forms. Who needs religion to see the wonder and depth of the universe?

Hallelujah!