(a species of owlet moth (Noctuid)) Some caterpillars, after they emerge from their egg, can increase their weight by 25,000 times.

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Science and nature kits

Pocket microscope

Pocket microscope - small image

Microscopes were invented in the 16th century but were huge and tricky to operate.

Not like our handy little pocket microscope: it's fun, portable and easy-to-use!

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