Edward David Penny CNZM FRSNZ is a theoretical and evolutionary biologist from New Zealand. He has researched the nature of evolutionary transformations, and is widely published in the fields of phylogenetic tree, genetics and evolutionary biology. Penny's contributions to science have been recognised with several awards and honours, and acceptance into the National Academy of Sciences.

The tree of life or universal tree of life is a metaphor, conceptual model, and research tool used to explore the evolution of life and describe the relationships between organisms, both living and extinct, as described in a famous passage in Charles Darwin's On the Origin of Species (1859).The affinities of all the beings of the same class have sometimes been represented by a great tree. I believe this simile largely speaks the truth.