How do parents prep their young for a changing world? Finch adults sing "heat calls" to their eggs, dampening genes for blood vessel regulation in the chicks' unhatched brains. This prepares them to dissipate heat for a hot world *before* they even hatch! What an adaptation.
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Adult finches have been observed making specific 'heat calls' as temperatures rise. This exposure to the songs before hatching appears to prepare the unhatched young's brains for the impending hot env
