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

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If there is a normal matter periodic table, is it plausible that there is an anti-periodic table? (e.g. anti-protons and whatnot make anti-elements)

808 upvotes

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If elements above 83 (+43, 61) are all man made, is it strictly impossible for them to appear in nature?

164 upvotes

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If an anti-element is possible, how does anti-radiation work?

58 upvotes

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What is the oldest known species of bacteria?

7 upvotes

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Energy of motion in a vacuum without gravity?

1 upvotes

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Why is female circumcision considered genital mutilation, while male circumcision is not?

1 upvotes

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Is there a possible Goldilocks zone for a planet orbiting a binary star?

1 upvotes

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How did sexual reproduction evolve over asexual reproduction?

1 upvotes

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If antimatter exists, is an anti-periodic table plausible?

1 upvotes

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Why do planets spin about an axis?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If there is a normal matter periodic table, is it plausible that there is an anti-periodic table? (e.g. anti-protons and whatnot make anti-elements)	808
If elements above 83 (+43, 61) are all man made, is it strictly impossible for them to appear in nature?	164
If an anti-element is possible, how does anti-radiation work?	58
What is the oldest known species of bacteria?	7
Energy of motion in a vacuum without gravity?	1
Why is female circumcision considered genital mutilation, while male circumcision is not?	1
Is there a possible Goldilocks zone for a planet orbiting a binary star?	1
How did sexual reproduction evolve over asexual reproduction?	1
If antimatter exists, is an anti-periodic table plausible?	1
Why do planets spin about an axis?	1