Submitted by You_Smiled t3_yeivce in askscience
Josette22 t1_iu1p6s0 wrote
Reply to comment by Upset-Ad4844 in How can the chicks breathe in their shell? by You_Smiled
This must be what goes on with a human fetus. We don't breathe with our lungs until we're born.
[deleted] t1_iu1vh4s wrote
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