Most people know that the giant redwood trees are no longer among the "oldest living things." The bristlecone pine, at 4,700 years, learly has the redwoods beat.
Some folks bet on the creosote bush in the Mojave Desert, which seems to be 11,000 years old.
But even the creosote bush is overwhelmed by a peculiar biological fluke. Near Carlsbad, New Mexico there is a salty lake containing bacteria in the spore state which are about 250 million years of age. The bacteria, dubbed "B. permians,' can be reanimated, making them the oldest living things on Earth at the moment of reanimation.