More than half of all known animal species on Earth are insects — critters with a hard external skeleton, three pairs of jointed legs, antennae and a body divided into three segments (the head, thorax ...

Horned treehoppers have the horned helmets to help "the treehoppers avoid predation through camouflage or intimidation," according to Nature Journal. 2. How many legs does a monkey slug caterpillar ...