Human childbirth can be a long, painful, drawn-out process, needing assistance and sometimes taking days. So why do close living relatives like chimps have an easier labour, giving birth in hours ...
Following is a transcript of the video. Imagine giving birth to a 24 pound baby. That’s 3 times the size of the average human newborn. Ouch! But for kiwi birds, giant chicks are the norm.
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