Mammals have gone back to the sea and become fully marine creatures like dolphins, but birds have only got as far as penguins so far Submitted by pufballcat t3_11chq9k on February 26, 2023 at 1:55 PM in Showerthoughts 6 comments 42
jsveiga t1_ja39e6a wrote on February 26, 2023 at 3:00 PM Penguins spend 75% of their time in the water, so they're getting there soon. Permalink 1
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