5 Season
100 Episode
Bill Nye the Science Guy - Season 3 Episode 18 Birds
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.
- Country : United States of America
- Genre : Comedy, Documentary, Kids
- Director : Bill Nye
- Cast : Bill Nye, Rachel Glenn, Jennifer Lin, Amy Broder, Ethan Ferkiss
