/u/Rredite's posts in /r/askscience

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Is it true that it is impossible to sterilize 100% of some parts of the Rovers' instruments that go to Mars? And as we once saw on the outside of an ISS window some form of life proliferating, what are the real possibilities of having terrestrial microscopic life evolving on Mars right now?

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If there are people who are able to distinguish a note just by hearing it once, and there are also people who can tell where and when a grape was grown just by drinking a sip, I wonder: Is there someone who is able to see a very specific shade of a color and guess which one is it? A super eye?

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On average, how many species of living beings are there in a human body? I've heard that there are more living beings in our digestive system alone than human cells in our body. But are there any estimates on species?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Is it true that it is impossible to sterilize 100% of some parts of the Rovers' instruments that go to Mars? And as we once saw on the outside of an ISS window some form of life proliferating, what are the real possibilities of having terrestrial microscopic life evolving on Mars right now?	1
If there are people who are able to distinguish a note just by hearing it once, and there are also people who can tell where and when a grape was grown just by drinking a sip, I wonder: Is there someone who is able to see a very specific shade of a color and guess which one is it? A super eye?	1
On average, how many species of living beings are there in a human body? I've heard that there are more living beings in our digestive system alone than human cells in our body. But are there any estimates on species?	1