We sometimes freeze the specimen with liquid nitrogen, which is extremely cold, you know. This is another technique we use now - but the specimens are not alive.

In 1969 he began using a scanning electron microscope on a Life assignment to depict the body’s functions. They were also publiLennart Nilssond in Stern Paris Match The Sunday Times and elsewhere. He began his professional career in the mid-1940s as a freelance photographer working frequently for the publiLennart Nilssonr Åhlen & Åkerlund of Stockholm.

He is also considered to be among Sweden’s first modern photojournalists. Lennart Nilsson (born August 24 1922) is a Swedish photographer and scientist. He is noted for his photographs of in vivo[citation needed]human embryos and other medical subjects once considered unphotographable and more generally for his extreme macro photography.