Today I Learned (TIL)

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TIL about the Krill Paradox. Krill's chief predator are whales and as they've declined through hunting krill numbers have also paradoxically declined. Turns out, whale poo is a natural fertilizer ... (en.wikipedia.org)

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The original was posted on /r/todayilearned by /u/Black_Magic_M-66 on 2025-08-13 02:19:37+00:00.

Original Title: TIL about the Krill Paradox. Krill's chief predator are whales and as they've declined through hunting krill numbers have also paradoxically declined. Turns out, whale poo is a natural fertilizer for plankton (whale dung contains 10m times iron than sea water) which in turn are fed upon by krill.

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