Materiales naturales y sintéticos – ¿Sabías que?

Silk is a natural material produced by the caterpillar of the Silk butterfly. During its transformation, the caterpillar forms a cocoon made of silk threads. These threads are created from a liquid that solidifies upon contact with air, with each silkworm producing over 1 km of silk thread.

What new insight or understanding did you gain from this video?