/u/[deleted]'s posts in /r/askscience

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Why do people experiencing a heart attack commonly feel pain in their left arms as an early symptom?

693 upvotes

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Why has a wheel never evolved in nature?

689 upvotes

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Why is pre-fission uranium relatively harmless to humans but spent nuclear fuel must be locked away for hundreds of years?

681 upvotes

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Are geostationary satellites only around the equator?

680 upvotes

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When people 'die in their sleep' are they actually asleep during the process, or would that process wake most people up?

670 upvotes

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Could I put an "Algae Farm" at my cubicle to make the air better?

670 upvotes

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Why does the hair on the average human head continue to grow while all other primates have hair that stops naturally at a relatively short length?

669 upvotes

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Is penis size 100% genetic, or could it be affected by environmental factors?

668 upvotes

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Why do some people suffer from extreme seasickness whereas others are perfectly fine?

665 upvotes

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Is there any chance of there being an undiscovered simple machine?

663 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why do people experiencing a heart attack commonly feel pain in their left arms as an early symptom?	693
Why has a wheel never evolved in nature?	689
Why is pre-fission uranium relatively harmless to humans but spent nuclear fuel must be locked away for hundreds of years?	681
Are geostationary satellites only around the equator?	680
When people 'die in their sleep' are they actually asleep during the process, or would that process wake most people up?	670
Could I put an "Algae Farm" at my cubicle to make the air better?	670
Why does the hair on the average human head continue to grow while all other primates have hair that stops naturally at a relatively short length?	669
Is penis size 100% genetic, or could it be affected by environmental factors?	668
Why do some people suffer from extreme seasickness whereas others are perfectly fine?	665
Is there any chance of there being an undiscovered simple machine?	663