Drawing of a group of shiitake mushrooms on a white background

Two men in uniforms riding horses on a dirt road

White background with a Star of David

Molecular model of a molecule with a red arrow pointing to the center

Black and white drawing of a river with a castle in the background

Black and white photo of a tree in the middle of a field

Diagram of a right triangle with a right angle and a left angle

Black and white drawing of a building with a clock tower

Black and white drawing of a plant with green leaves