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

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On tv a while ago, Brian Greene said that we may see gravity as the weakest force because it may only exist partly in our universe and partly in another. Is this considered a credible theory today? If so, would the gravity waves we've observed be traveling through those other universes as well?

2550 upvotes

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Why is it better that propellors pull airplanes through air but push boats through water?

36 upvotes

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What causes Cheerios (and other cereals) to link up into little rafts?

15 upvotes

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Could frozen fish be lying around on the surface of Europa?

13 upvotes

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Does pushing on an object propagate through the object at its speed of sound?

6 upvotes

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Are the martian landscapes we see in photographs uncharacteristically flat and smooth for Mars in order to make it easier for the rovers? Are there typical, dramatically steeper/rockier landscapes that we haven't seen yet from the ground because the rovers can't go there?

3 upvotes

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How much continent-wide dispersal of information was there among pre-contact native americans?

2 upvotes

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How much error is there in eclipse predictions? Are there ever any (even very slight) surprises?

1 upvotes

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Do experiences that we "can't find the words to describe", (sometimes) correlate to activity in the brain that is physically cut off from speech centers?

1 upvotes

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Why did it take so long to invent the bicycle?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
On tv a while ago, Brian Greene said that we may see gravity as the weakest force because it may only exist partly in our universe and partly in another. Is this considered a credible theory today? If so, would the gravity waves we've observed be traveling through those other universes as well?	2550
Why is it better that propellors pull airplanes through air but push boats through water?	36
What causes Cheerios (and other cereals) to link up into little rafts?	15
Could frozen fish be lying around on the surface of Europa?	13
Does pushing on an object propagate through the object at its speed of sound?	6
Are the martian landscapes we see in photographs uncharacteristically flat and smooth for Mars in order to make it easier for the rovers? Are there typical, dramatically steeper/rockier landscapes that we haven't seen yet from the ground because the rovers can't go there?	3
How much continent-wide dispersal of information was there among pre-contact native americans?	2
How much error is there in eclipse predictions? Are there ever any (even very slight) surprises?	1
Do experiences that we "can't find the words to describe", (sometimes) correlate to activity in the brain that is physically cut off from speech centers?	1
Why did it take so long to invent the bicycle?	1