life:

Science nerds, rejoice! Today we pay our tribute to LIFE’s dedicated science photographer, Fritz Goro.

Goro liked to say that his expertise was due at least in part to his own ignorance. He photographed subjects that “more knowledgeable photographers might have considered unphotographable…. I began to take pictures of things I barely understood, using techniques I’d never used before.”

Pictured: A pair of 90-day-old cow fetuses clearly visible inside an amniotic sac, 1965.

Prepare to be amazed: see the incredible work of Fritz Goro here.