What is the Oldest Living Organism on Earth?

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A tree.
The Old List is curated by scientists and is a list of all officially dated ancient trees (image credit: Unsplash/Roman Averin).

"What's the oldest tree or other living organism on Earth?" That question was posed to BBC Crowd Science, and it turns out it's a difficult question to answer. The oldest confirmed organism is a bristlecone pine tree in California that's 5,067 years old. But its possible there are a few other organisms on the planet that are much older.

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What is the Oldest Living Organism on Earth?
Marnie Chesterton
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Profile picture for user Jesse Rogerson
Jesse Rogerson, PhD

As a passionate science communicator, Jesse Rogerson loves promoting science literacy to the public. He frequently represents the Canada Aviation and Space Museum on television and radio, social media, and at conferences. A trained and practicing astrophysicist, Jesse holds a PhD in observational astrophysics from York University, and publishes his research in peer-reviewed journals. Jesse enjoys riding his motorcycle, board games, and ultimate frisbee.