Who said "Every scientist stands at the frontier of knowledge."?

This quote is attributed to Karl Landsteiner.

Every scientist stands at the frontier of knowledge. - Karl Landsteiner

"Every scientist stands at the frontier of knowledge."

Karl Landsteiner Imagination

Immunologist Austrian-American 1868–1943

"Science is organized knowledge."

"The unknown is always feared."

"Discovery requires curiosity and patience."

"Blood types reveal the hidden connections between humanity."

"Imagination is more powerful than knowledge."

"The world is full of wonders if you know where to look."

"You have the imagination of a child, Lucy"

"The world is full of mysteries waiting to be solved."