Bill Nye the Science Guy (1993)
Season 3: Episode 18
Birds
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Air Date:
Genre
Release Date
1993
End Date
1998
Episode Description
Scientists believe that birds evolved from reptiles. Birds have backbones, and they lay eggs, but they’ve developed a unique feature that sets them apart from all other animals – feathers. Feathers are made of the same stuff human fingernails and hair are made from – a protein called keratin. Feathers, combined with lightweight bones, powerful wings and strong hearts let birds fly.
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