Great Basin bristlecone pines (Pinus longaeva) are the world's oldest trees, with a lifespan of over 5,000 years.
These trees can be found in the high-altitude deserts of California and Nevada, where the hard conditions allow them to live so long.
Methuselah, the oldest known individual bristlecone pine, is nearly 4,854 years old.
The Abarqu Cypress in Iran, which is thought to be between 4,000 and 5,000 years old.
The Vouves Olive Tree in Greece, thought to be over 3,000 years old.
Pando, a clonal colony of quaking aspen trees believed to be between 80,000 and 14,000 years old in Utah.