they just know
No
Archaeologists.
Archaeologists dig up fossils!
Dig in the ground looking for ancient civilization artifacts that have been left behind. Much of what we know about history was found by archaeologists.
Excavation site
An excavation site
Archaeologists dig up the past, studying human history, especially the culture of historic and prehistoric people.
Archaeologists are the individuals who study and uncover artifacts from the past through excavation and analysis.
They dig up bones and fossils of things that existed before humans, such as dinosaurs, or maybe even ancient humans!
they dig up bones and jornals that are from the past
Archaeologists can dig up artifacts pretty much anywhere, although in practice where they chose to dig will be affected by several factors. Archaeologists will conduct excavations only in places where they find evidence of past human activity and the excavation of the site will provide useful information. Excavations are planned and not conducted at random.
Scientists know about dinosaurs because they have got archaeologists to go around the world and dig up the ground to find the remains of dinosaurs. Many archaeologists have found the remains of dinosaurs and you can go to your local museum and nearly every museum has a dinosaur part with real dinosaurs bones and remains.