paleontologist

US /ˌpeɪ.li.ənˈtɑː.lə.dʒɪst/
UK /ˌpeɪ.li.ənˈtɑː.lə.dʒɪst/
1.

古生物學家

someone who studies fossils as a way of getting information about the history of life on Earth:

:
No paleontologist has any clue as to what a living dinosaur actually looked like.