• Testosterone in crystalline form (light microscopy). ©Lennart Nilsson/SPL
  • Estrogen in crystalline form (light microscopy). ©Lennart Nilsson/SPL
  • Insulin in crystalline form. (Light microskopy) ©Lennart Nilsson/SPL
  • Progesterone in crystalline form. Lennart Nilsson/SPL
  • Testosterone in crystalline form (light microscopy). ©Lennart Nilsson/SPL
  • Estrogen in crystalline form (light microscopy). ©Lennart Nilsson/SPL
  • Insulin in crystalline form. (Light microskopy) ©Lennart Nilsson/SPL
  • Progesterone in crystalline form. Lennart Nilsson/SPL

Look at the images in Life Magazine 23 april 1971