Blog: Carry-on-my-wayward-blog
![they-grew-up-heroess 0](https://31.media.tumblr.com/4545ab037745109f2ba223dcf367a945/tumblr_nn7v74U61O1sn75h6o1_500.jpg)
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original: https://they-grew-up-heroess.tumblr.com/post/117642388685
awwww-cute: Seal bones don’t form until they reach maturity after their third winter. Until then, pups are very flexible, and internally have a system of blubber-filled balloons instead of bones (Source: http://ift.tt/1DAvWLF)