Science Memes

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Nihilism spectrum (mander.xyz)

submitted 2 weeks ago by [email protected] to c/[email protected]

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[–] [email protected] 3 points 2 weeks ago (4 children)

Fun fact: humans are geometrically a donut.

[–] [email protected] 3 points 2 weeks ago (2 children)

I'm sure most people have more (topological) holes than one

Both nostrils, for example

[–] [email protected] 3 points 2 weeks ago (1 children)

The nostrils are connected to the throat through the sinuses as are the ear canals. Topologically making them all part of the same mouth-anus throughole.

[–] [email protected] 3 points 2 weeks ago* (last edited 2 weeks ago)

Not true, topolgically the route

left nostril -> sinus -> right nostril

is another hole. So is

any nostril -> sinus -> mouth.

ears have the eardrum, so they don't count.

For the more formal definitions of topological holes, look up Betti numbers, I think there's a VSauce video about it? For humans, the number of holes is at least 3 (but I'm sure I'm missing many more holes). Unless you're missing the entire septum.

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