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

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How do Olympiads keep breaking world records? Won't there come a point where they can be broken no longer?

424 upvotes

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Thinking I was clever I used my SodaStream to blow up my daughter's birthday balloons. Just a handful of hours later they were deflated. What happened?

365 upvotes

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How do ships in space measure their velocity? Do they have to calculate it based on their thrust and weight (which is constantly changing as it burns fuel).

31 upvotes

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How do we know there is a single "common maternal ancestor" for everyone on the planet without having tested everyone?

24 upvotes

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How stable is the current configuration of sub-atomic matter in the universe? Is it possible for another arrangement to spontaneously occur?

5 upvotes

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How well understood are the differences in how emotions are experienced with different intensity from one person to the next?

5 upvotes

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Do first time vaccinations work on young adults as well as on children?

5 upvotes

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Winter in the Northeast U.S. means lots of static shocks. Is there a way to compute the maximum voltage a human body can store for a shock?

5 upvotes

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How do nutritionists know that something has zero calories?

3 upvotes

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I swear minutes after eating certain greasy foods (pepperoni pizza, potato chips) my face gets greasier than before. Am I imagining this?

2 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How do Olympiads keep breaking world records? Won't there come a point where they can be broken no longer?	424
Thinking I was clever I used my SodaStream to blow up my daughter's birthday balloons. Just a handful of hours later they were deflated. What happened?	365
How do ships in space measure their velocity? Do they have to calculate it based on their thrust and weight (which is constantly changing as it burns fuel).	31
How do we know there is a single "common maternal ancestor" for everyone on the planet without having tested everyone?	24
How stable is the current configuration of sub-atomic matter in the universe? Is it possible for another arrangement to spontaneously occur?	5
How well understood are the differences in how emotions are experienced with different intensity from one person to the next?	5
Do first time vaccinations work on young adults as well as on children?	5
Winter in the Northeast U.S. means lots of static shocks. Is there a way to compute the maximum voltage a human body can store for a shock?	5
How do nutritionists know that something has zero calories?	3
I swear minutes after eating certain greasy foods (pepperoni pizza, potato chips) my face gets greasier than before. Am I imagining this?	2