Fossil spider from the Cretaceous era Spiders evolved from annelid worms beginning about 540 million years ago. They were among the first land creatures with more than one cell. At about the same time, the [...]
Bee on a flower What are arthropods? Insects, spiders, crabs, and lobsters are all arthropods, so there are a lot of arthropods on Earth. Annelid worms All our biology articles [...]
Evolution of grasshoppers: Grasshopper sitting on a leaf Why do grasshoppers jump? When grasshoppers first evolved from earlier insects, about 300 million years ago, they lived in forests of huge [...]
Evolution of ants: A bunch of ants When did ants evolve? Ants evolved from earlier wasps about 150 million years ago, during the Cretaceous period. The evolution of ants was around [...]
