John Smith I wrote:
Get real ... fairy tales are best used to amuse children ...

Consider that the earth is about 4.5 billion years old
while the Milky Way galaxy may be about 12 billion years
old, not much younger than the universe itself. Some early
evolved intelligent life forms could possibly have been
seeding our galaxy for billions of years.

We are also discovering "nanobes" so small (20 nm) that
we never realized that they were alive before now. These
critters contain only about 10 DNA molecules.

http://www.nytimes.com/library/natio...e-nanobes.html
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73, Cecil http://www.w5dxp.com