humanity 8 Liked! 0 Disliked 197 The science of why boobs get so big by: Staff In: Humanity, Interesting, Science Jun 4, 2019 8 Liked! 0 Disliked 197 1 There are over 5,000 different species of mammal on this planet. But humans are the only ones with permanent breasts. Also, humans have rather large breasts in comparison to both other species as well as their own bodies. Like this post? 8 Liked! 0 Disliked 197
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