Question

Fun Fact #44: You know when you poke those little slaters and they curl up? Now imagine a millipede that when it rolls up is the size of a ping-pong ball! These millipedes are are known as giant pill millipedes. They are short and fat and have the special ability to completely roll into a ball, tucking their head and legs in. These millipedes can grow up to about 5cm's long and 2.5cm's wide.

Answer 1

Source: http://terranature.org/gigantism.htm
http://en.wikipedia.org/wiki/Sphaeromimus

And have a good Wednesday!