The remarkable transformation of a cotton flower into cotton fibers.

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Feathers: ancient, engineered, and more than just for flight.

First seen in dinosaurs 150M years ago, perfected by birds today. Made of keratin, hooked like Velcro, a single bird can carry 20,000+.

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Singing bird boxes were extremely popular in Europe starting from the 18th century.

This video shows a singing bird box made by Frères Rochat, Switzerland.

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Turtles can survive being frozen solid in ice during winter.

They enter 'brumation', slow their heartbeat to once every few minutes, and wait for spring to thaw them out.

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