Close up of a plant with green leaves and yellow flowers

Diagram of a circle with a center and a line going through it

Black and white photo of a bridge spanning a body of water

Man walking down a concrete walkway in a park

Old black and white photo of a man sitting at a desk

Old book with a brown cover on a black background

Black and white drawing of a group of people standing on top of a…

Common teasel plant in the middle of a field with a tall building in…

Red stamp with Chinese writing on it against a white background