There are some 70,000 species of crustacean—the group that includes crabs, lobsters, shrimp and crayfish—in the world, and until very recently, none of them were known to be venomous. This has made ...

All insects belong to the phylum Arthropoda. But unlike other arthropods—like lobsters, spiders, or millipedes—insects have three pairs of jointed legs, segmented bodies, an exoskeleton, one pair of ...