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Why Do These Penguins Kill Their First Egg?

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In what seems like an inefficient use of resources, these penguins always lay two eggs, but then ignore, discard, or just straight-up destroy the first one. What gives, penguins?

Hosted by: Hank Green

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Sources:
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0275106
https://www.eurekalert.org/news-releases/966785

Images:
https://www.inaturalist.org/observations/78822072
https://www.inaturalist.org/observations/78700704
https://www.eurekalert.org/multimedia/960308
https://commons.wikimedia.org/wiki/File:Eudyptes_sclateri_distribution_(nesting).png
https://www.gettyimages.com/detail/video/vintage-audio-tape-with-a-blank-label-spinning-in-stock-footage/1393574883?phrase=1990s&adppopup=true
https://www.eurekalert.org/multimedia/960307
https://commons.wikimedia.org/wiki/File:Gorfou_sauteur_-_Rockhopper_Penguin.jpg
https://commons.wikimedia.org/wiki/File:Falkland_Islands_Penguins_88.jpg
https://commons.wikimedia.org/wiki/File:Antipodes_Penguin.JPG
https://www.gettyimages.com/detail/photo/erect-crested-penguin-eudyptes-sclateri-royalty-free-image/1436893651?phrase=Erect-crested%20penguin&adppopup=true
https://www.inaturalist.org/observations/78695043
https://www.inaturalist.org/observations/78700707
https://www.gettyimages.com/detail/photo/erect-crested-penguin-eudyptes-sclateri-royalty-free-image/1436893709?phrase=Erect-crested%20penguin&adppopup=true
https://commons.wikimedia.org/wiki/File:Bounty_Islands_Sub-Antarctic_New_Zealand_Panorama_1.jpg
https://www.inaturalist.org/observations/78819746
https://commons.wikimedia.org/wiki/File:Eudyptes_sclateri_1199915.jpg
https://commons.wikimedia.org/wiki/File:Eudyptes_sclateri_129036208.jpg
https://www.inaturalist.org/observations/106136113
https://commons.wikimedia.org/wiki/File:Eudyptes_sclateri_13494624.jpg
https://www.inaturalist.org/observations/78700699
Category
Science
Tags
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