favorite - a person, place or things that you really like., dream - wish to do, be, or have something, determine - to find out the facts about something, stumbling upon the past - To meet or encounter something by chance, pastime - something that you do because you think it is enjoyable or interesting → hobby, paleontologists - are the people who studied fossils, dinosaur - is one of a group of reptiles that lived millions of years ago, ravine - a deep narrow valley with steep, examine - to look at something carefully, sedimentary rocks - rocks that form when sediments are compacted and cemented together, layer - an amount or piece of a material or substance that covers a surface, ash - the soft grey powder that remains after something has been burned, trip - an act of falling as a result of hitting something with your foot, skull - the bones of a person’s or animal’s head, excavate - to make a hole in the ground by digging up soil,

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