How useful do you think it is for humans to uncover objects from the past?

Very helpful. Knowing what happened in the past helps us in the present. It is amazing what is learned from looking at items from the past. If you have never been to a museum or historical site go. Much of what we do today is based on what has gone on in the past and what we will do tomorrow is will be started today. All things, people, and events are connected through out history. If man hadn't invented the wheel there wouldn't be a car. If gears and clogs hadn't been invented most of the modern world wouldn't run. If the radio hadn't been invented your cell phone wouldn't work.