orogenicman
Darwin was a pastafarian
- Jul 24, 2013
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Not all life!The vast majority of the universe is composed of hard vacuum and deadly radiation, both of which are utterly destructive to life.
Ultraviolet lighting is integral for the growth and maintenance of many reptile and amphibian species. In fact, in many home terrariums, many diseases seen by veterinarians are attributed to ultraviolet lighting deficiencies!
In the vast bulk of the universe, it is. There may be life elsewhere in the universe (I'd be shocked if there weren't). But the life we know of doesn't even comprise a speck of sand in all the sands on the Earth compared to the vastness of the universe where life cannot exist.
UV-B radiation is dangerous to all life on Earth, even reptiles and amphibians. But the really bad stuff, cosmic rays and gamma rays permeates the vacuum of space, and is deadly. In all the universe, life is most likely the exception, NOT the rule.