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

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Would it be possible to have a planet large enough that it is actually the center of the system and a smaller star revolves around it?

1658 upvotes

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How does a stem cell know what body part to become naturally?

1340 upvotes

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Do other animals, aside from humans, sleepwalk?

39 upvotes

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Why do many invertebrates have Hemolymph rather than "normal blood" like vertebrates?

24 upvotes

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Why is the palm a lighter tone than the skin of someone with a dark complexion?

21 upvotes

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Is there any matter between galaxies?

19 upvotes

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How do underwater plants get carbon dioxide?

14 upvotes

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What is the evolutionary benefit of a citrus fruit growing as a ball of "slices"?

6 upvotes

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If I take blood from my arteries and inject it into my veins what will happen to me?

6 upvotes

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Why do bubbles form into spheres once they leave the bubble wand?

6 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Would it be possible to have a planet large enough that it is actually the center of the system and a smaller star revolves around it?	1658
How does a stem cell know what body part to become naturally?	1340
Do other animals, aside from humans, sleepwalk?	39
Why do many invertebrates have Hemolymph rather than "normal blood" like vertebrates?	24
Why is the palm a lighter tone than the skin of someone with a dark complexion?	21
Is there any matter between galaxies?	19
How do underwater plants get carbon dioxide?	14
What is the evolutionary benefit of a citrus fruit growing as a ball of "slices"?	6
If I take blood from my arteries and inject it into my veins what will happen to me?	6
Why do bubbles form into spheres once they leave the bubble wand?	6