Scholastic News Article: Which Is A Better Pet?

vertically

in an up and down direction

patrolling

involves periodically scanning an area to make sure that nothing in the area has changed

artificial

something made; not occurring naturally

prosthetic

an artificial body part

alternative

another option or choice

paleontologists

scientists who study ancient life forms

resiliency

the ability to recover after difficult situations

replicate

to repeat, to copy, or to duplicate