Evolution is described as the ability of a species to adapt over time to their environment. Elephants in Africa are slowly adapting to poachers and are losing their trunks and therefore the tusks the poachers are after. Fish in the Hudson River have adapted to be able to survive the polluted waters. Cats dogs and other animals that were exposed to extreme radiation at the meltdown site in Russia are adapting and surviving the radiation. They're breeding radiation tolerant offspring.