Watch how unhatched birds get oxygen inside their shells, and file this great explainer under "questions previously unconsidered that have interesting answers." https://boingboing.net/2018/05/12/watch-how-unhatched-birds-get.html …pic.twitter.com/nWIrvUIsqq
1:50 PM - 8 Jul 2018
0 replies
4 retweets
17 likes
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.