- Estreno original
- Episodio anterior S03E17 - Wetlands
- Número S03E18
- País Estados Unidos
- Géneros Infantil, Comedia, Documental, Familias
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Enlaces externos
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Última actualización
7 mars 2025 - 09:14
en 11 bases de datos
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.
Episodio siguiente
S03E19 - Populations
