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

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Why do flames take a clearly defined form, rather than fire just being a glow of incandescent radiation?

9109 upvotes

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If we viewed a star "going supernova" in real time, would it look like a violent explosion, or does it take a long time?

3898 upvotes

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Are some 3D curves (such as paraboloids, spheres, etc.) 3D "sections" of 4D "cones", the way 2D curves (parabolas, circles, etc.) are sections of 3D cones?

3046 upvotes

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What is the bottom of a tectonic plate like?

2061 upvotes

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Why are humans psychologically satisfied by blankets?

1024 upvotes

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Where did the Earth's atmosphere come from? Did it just somehow already have one when it formed, or pass through a gas cloud in space, or create its own gas somehow?

763 upvotes

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Do animals that use tools ever display some thought of "This tool in particular is the best of its kind" and keep them, or do they generally always just make a new one every time they need one?

176 upvotes

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Why can't humans create a food that contains everything the body needs?

169 upvotes

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When talking about photons, what does "wavelength" actually mean?

145 upvotes

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Why do the mid-ocean ridges in this global seafloor map have horizontal lines running across them for basically their whole length?

96 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why do flames take a clearly defined form, rather than fire just being a glow of incandescent radiation?	9109
If we viewed a star "going supernova" in real time, would it look like a violent explosion, or does it take a long time?	3898
Are some 3D curves (such as paraboloids, spheres, etc.) 3D "sections" of 4D "cones", the way 2D curves (parabolas, circles, etc.) are sections of 3D cones?	3046
What is the bottom of a tectonic plate like?	2061
Why are humans psychologically satisfied by blankets?	1024
Where did the Earth's atmosphere come from? Did it just somehow already have one when it formed, or pass through a gas cloud in space, or create its own gas somehow?	763
Do animals that use tools ever display some thought of "This tool in particular is the best of its kind" and keep them, or do they generally always just make a new one every time they need one?	176
Why can't humans create a food that contains everything the body needs?	169
When talking about photons, what does "wavelength" actually mean?	145
Why do the mid-ocean ridges in this global seafloor map have horizontal lines running across them for basically their whole length?	96