How Long Will Mount Rushmore Be Here?
Channel: Science Saturdays
Date: 2014-01-25

Learn more for free: https://www.khanacademy.org/a/372h

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If you would like to read along while you listen to the video, you can turn on closed captions. Normally, I have the video's script in the description, but today's script is too big to fit. I apologize for the inconvenience.