Description: The Giant Panda has a paw, with a "thumb" and five fingers; the "thumb" is actually a modified sesamoid bone, which helps the panda to hold the bamboo while eating. Stephen Jay Gould wrote an essay about this, then used the title The Panda's Thumb for a book of essays concerned with evolution, punctuated equilibrium, intelligent design, the Piltdown Man hoax, Down's Syndrome, and the relationship between dinosaurs and birds among others.    

Description: The Giant Panda has a paw, with a "thumb" and five fingers; the "thumb" is actually a modified sesamoid bone, which helps the panda to hold the bamboo while eating. Stephen Jay Gould wrote an essay about this, then used the title The Panda's Thumb for a book of essays concerned with evolution, punctuated equilibrium, intelligent design, the Piltdown Man hoax, Down's Syndrome, and the relationship between dinosaurs and birds among others.