Here Home Free Newsletter Subscribe now. Simply enter your details and hit send. Some Strange but True Facts about Insects Insects outnumber humans on earth by 250,000 to 1. There have been more than 1,000,000 different kinds of insects discovered in the world. In the U.K. there are more than 21,000 different kinds.
All insects have six legs.
The skeleton of an insect is on the outside of its body. It's called an 'exoskeleton'. The eyes of insects are made up of lots of tiny lenses called 'facets'. This sort of eye is called a 'compound eye'. Some insects have 100 facets on each eye, others, like dragonflies, have up to 28,000.