Is the Inside of Your Mouth a Soup? (a vidcon reunion video)

From vlogbrothers.

We recorded this at VidCon (at John’s suggestion!!) and I edited it up so I figured we could sprinkle a little bit of John into John-Free July!

Tom Lum’s video on carbon dating: https://www.youtube.com/watch?v=XN758QmTus0

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