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[-]  09-11-18 16:45

Business Insider
The science of why human breasts are so big
Breasts are uniquely human — more than 5,000 mammals inhabit this planet, yet Homo sapiens are the only life forms with permanent breasts. 
Every other mammal develops temporary breasts during ovulation or nursing in order to produce milk for their young. 
Watch the video above to learn why humans evolved to have breasts and what they're actually made of. 
Following is a transcript of the video.
Breasts come in different shapes and sizes, but there's one thing they all have...

Read the full article on Business Insider »
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