Old black and white photo of a man in a sailor's uniform

Molecular model of a peptide molecule with a red

Black and white drawing of a woman in a dress

White background with the text &quot;cornejo for president&quot; written in blue…

Black and white drawing of a machine with a pendulum attached to it

CT scan of the brain

Black and white drawing of a toucan perched on a branch

Diagram of a prism with a line drawn on it

Old black and white photo of a large building with windows