fairy shrimp: small freshwater branchiopod having a transparent body with many appendages; swims on its back
branchiopod crustacean: aquatic crustaceans typically having a carapace and many pairs of leaflike appendages used for swimming as well as respiration and feeding
nuclear winter: a long period of darkness and extreme cold that scientists predict would follow a full-scale nuclear war; a layer of dust and smoke in the atmosphere would cover the earth and block the rays of the sun; most living organisms would perish