What is the 'sunk cost fallacy'? Is it ever a good thing?

Have you ever encountered a subpar hotel breakfast while on holiday? You don't really like the food choices on offer, but since you already paid for the meal as part of your booking, you force yourself to eat something anyway ...

Arctic terns may navigate climate dangers

Arctic terns—which fly on the longest migrations of any animal on Earth—may be able to navigate the dangers posed by climate change, new research suggests.

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