Neolithic arrowhead from the Neolithic period placed on a black…

Close up of a leaf on a piece of paper with a scale on the right side…

Plant with green leaves and red flowers on a piece of paper

Specimen of a plant with brown leaves on a white background

Black and white drawing of a man in a military uniform

Small brown bee sitting atop a white surface

Old map of the city of San Francisco

Black and white photo of a house with a tree in front of it

Forest filled with lots of trees and dry leaves on the ground