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The oldest living things in the world

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The bristlecone pine, the yucca, the map lichen and stromatolites, what do they all have in common?  They just happen to be some of the most ancient organisms on the Earth.  What can we learn from the oldest living organisms on Earth that may help us in the future?  Watch this lesson from It's Okay to Be Smart and see what you come up with.  

2. Scientists have a complete understanding of how bristlecone pine trees grow to be so old.

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