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evolution – n. the process by which changes in plants and animals happen over time
fossil - n. remains of an organism from the past
stem cell(s) – n. an unspecialized cell that gives rise to differentiated cells
neuron(s) – n. a cell that carries messages between the brain and other parts of the body and that is the basic unit of the nervous system
emerge(d) – v. to become known or apparent
fascinating – adj. very interesting
origin(s) – n. a cause, rise or beginning
ultimate – adj. greatest or most extreme
relative(s) – n. an animal or plant connected to another by common ancestry
abnormalities – n. things that are not normal or usual, usually in a way that is undesirable or worrying
