Humans fear wasps for their sting, but some insects, like caterpillars, have a different reason to be wary: they are little more than prey to the more than 50,000 species of parasitoid wasp in the family Braconidae. Most braconids kill their hosts with viruses that suppress the immune system and allow the wasp’s eggs to grow inside a host undetected. These polydnaviruses are actually produced by the wasps using viral genes that were integrated into their DNA how many million years ago? Discuss