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What's Inside? is a YouTube a channel ran by father and son duo Dan and Lincoln Markham. They are famous for cutting various things open and seeing what's inside.

The channel has more than 390 million video views, 4.3 million subscribers  and have been on Youtube since 2008. Some of the things that they have cut open are: a MacBook, an electric bike, an olympic torch, a rattlesnake rattle, and even the Youtube Gold play button.  (IN) short these YouTubers are amazing creators who enjoy experiments.


Dan was born in Detroit, Michigan and Lincoln was born in Arizona.
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Dan and Lincoln have collaborated with Studio C 


2015 Decenber 15th 1 million subscribers

2016 June 4th 2 million subscribers 

2017 Febuary 3rd 3 million subscribers

2017 March 10th 4 million subscribers

Currennt subscribers: 4.3 million

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