The 88-hour journey requires a fuel consumption of 82.2 grams, but their "fuel tank" is only filled up to 70 grams, 12 grams less than what is needed! In other words, The birds would "run out of fuel" about 500 miles short of Hawaii and plunge into the sea!

Why don't our feathered friends plop into the icy ocean water and die short of their destination?

Can evolution provide an answer to this perplexing fuel consumption problem?



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