Selman A. Waksman at work in the laboratory, 1953.

New York World-Telegram and the Sun staff photographer: Higgins, Roger, photographer. Public domain, via Wikimedia Commons

Selman Waksman and two female associates testing Streptomycin, a bacterial antibiotic produced by the soil actinomycete - chiefly used in the treatment of tuberculosis, at New Jersey Agriculture Experimental Station at Rutgers University.

Source: National Museum Of American History/National Institutes of Health. Unknown photographer, Public domain, via Wikimedia Commons