Based on the available information, the oldest tree mentioned, Methuselah, is considered alive. Methuselah is a Great Basin bristlecone pine located in eastern California. Tree-ring data has determined that Methuselah is approximately 4,853 years old, meaning it has been growing since well before the construction of the Egyptian pyramids at Giza. Therefore, as of the date the information was provided (June 6, 2022), Methuselah is still considered alive.