Piece of paper with a QR code on it next to a ruler

Open book with a drawing of a man in a top hat standing in front of a…

City street with cars and motorcycles driving down it

Black and white engraving of a group of ships in the ocean

Group of people sitting in a lecture hall

Brittlebush cactus growing out of a rock in the middle of a field

Man riding a motorcycle across a bridge with railings on either side

Black and white photo of a river with trees in the background

Black and white drawing of various types of freshwater mussels on a…