Old church with a red roof in the middle of a lush green field…

Old book with a drawing of a machine on it

Train track winding through a lush green forest

Brown butterfly sitting on top of a white surface next to a ruler

Close up of a small brown paramecium on a white surface

Black and white photo of people walking down a street

Open book with a drawing of a group of men in uniform

Black and white photo of a city street with a group of people standing…

Large group of people walking down a street lined with tall buildings