Rachel Sussman spent a decade working with biologists and traveling the globe to photograph continuously living organisms that are 2,000 years old and older. She traveled to remote locations from Greenland to Antarctica, Africa and Australia for her book
The Oldest Living Things in the World
Above, bristlecone pines are the oldest unitary organisms in the world, known to surpass 5,000 years in age. In the 1960s a then-grad student cut down what would have been the oldest known tree in the world while retrieving a lost coring bit. A cross section of that tree was placed in a Nevada casino.
PHOTOS: Sweet Methuselah! Oldest Animals on the Planet