Bunch of brown leaves on top of a piece of paper

Drawing of a fountain in the middle of a park

Black and white drawing of a man standing in the woods

Drawing of a group of birds sitting on top of a table

Black and white drawing of a woman standing in a field of flowers

Drawing of a plant with green leaves and blue flowers on a paper

Two cats walking across a bridge over a river

Black and white drawing of various surgical instruments on a piece of…

Sir Isaac Newton