Excreting Greeting Cards

James Gillray

Hans Sebald Beham

David Parker

Dr. Nick Kurzenko

Animated Healthcare Ltd/science Photo Library

Medi-mation/science Photo Library

Animated Healthcare Ltd/science Photo Library

Medi-mation/science Photo Library

Tony Craddock/science Photo Library

Russell Kightley/science Photo Library

Patrick Landmann/science Photo Library

Animated Healthcare Ltd/science Photo Library

Thierry Berrod, Mona Lisa Production/ Science Photo Library

Thierry Berrod, Mona Lisa Production/ Science Photo Library

Bob Gibbons/science Photo Library

David Mack

David Mack

Joseph F. Gennaro Jr.

Mike Savad

Les Classics

Doug Wechsler / Naturepl.com

David Mack

Susumu Nishinaga

David Mack

Biomedical Imaging Unit, Southampton General Hospital

Francis Leroy, Biocosmos

Susumu Nishinaga

David Mack

Biomedical Imaging Unit, Southampton General Hospital

David Mack

Francis Leroy, Biocosmos

M. I. Walker

Science Photo Library

Joseph F. Gennaro Jr.

Garry DeLong

Gwen Shockey

Georgette Douwma

Georgette Douwma

Scimat

Scimat

Scimat

Scimat

Gwen Shockey

Anthony Mercieca

Bella B Photography

Meckes/ottawa

Doug Wechsler / Naturepl.com

Doug Wechsler / Naturepl.com

Ram Prasad

Reimar Gaertner

Benjavisa Ruangvaree

Eddy Mann

Raimo Bergroth

Raimo Bergroth

Raimo Bergroth