Silkworms are extraordinary creatures that play a huge economic role in the world of man. If you didn’t know the silkworm is the only completely domesticated insect in the world, which means it can not survive naturally in the wild.They are bread for their precious cocoon, that is processed into the precious material we know as silk. Silkworms are only fed mulberry tree leaves, on which they nibble non-stop, day and night. This causes them to grow incredibly fast and start creating their precious cocoon. That is made out of a continuous silk thread between 300m and 900 m long. Koreans appreciate the silkworm as a delicacy as they are a great source of protein and after they die they become infected with Beauveria bassiana fungus, which is used in Chinese traditional medicine.