three-dimensional – adj. having or seeming to have length, width, and depth

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

preserved – adj. kept in good condition over a long period of time

skin – n. the natural outer layer of tissue that covers the body of a person or animal

pigment – n. a natural substance that gives color to animals and plants

circumstances – n. the way something happens; the specific details of an event

pattern – n. a repeated form or design especially that is used to decorate something