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What is that noise you can hear if you “tense your ears”? That’s the best way I can describe the action but you hear a rumbling/wind noise

2563 upvotes

129 upvotes

Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
What is that noise you can hear if you “tense your ears”? That’s the best way I can describe the action but you hear a rumbling/wind noise	2563
How do things like arteries stay “watertight” after being stitched together in an operation?	129