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Bill Nye the Science Guychevron_right
S03E18: BirdsScientists 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.
Genres:
Air Date:
Oct 13, 1995
Runtime:
26 minutes
Production:
Casts:
Bill Nye, Rachel Glenn, Jennifer Lin, Amy Broder, Ethan Ferkiss
