古老的鱼儿重回伊利诺斯水域

fossil – n. something (such as a leaf, skeleton, or footprint) that is from a plant or animal which lived in ancient times and that you can see in some rocks

predator – n. an animal that lives by killing and eating other animals; an animal that preys on other animals

species – n. a group of animals or plants that are similar and can produce young animals or plants; a group of related animals or plants that is smaller than a genus

stock – v. to fill something with a supply of things

down the road – expression in or into the future