Museum scientists are no different. They just ask slightly different ones. Museum scientists work to answer this question. In some cases they can decide that new examples or specimens are the same as others they have already identified. In other cases the new specimens will be different from anything known so far.
Taxonomists describe the new specimen and decide how it relates to other known species.
Biologists who study biological diversity, or biodiversity as it is usually called today, work to answer these questions. The answer helps us understand today's world and how the past differed from the present. Biogeographers map where different animal species are found and match this with the plants that occur in the same regions. Ecologists try to answer these questions, which are very difficult because many different aspects are involved. The fossilized bones of long-dead animals help palaeontologists to discover how modern animals evolved to be as they are.