Last time we learned about Mars' great Valles Marineris, the largest canyon in the solar system. But what about here on Earth, is the Grand Canyon really the biggest? What I thought to be a simple question turns into an 11 minute video, buckle up!

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Some links:

https://web.archive.org/web/200901101...

https://www.statista.com/statistics/2....
http://www.ccpo.odu.edu/~klinck/Repri...

https://pubs.usgs.gov/of/1996/ofr96-4...

http://www.19thcenturyscience.org/HMS...

http://adsabs.harvard.edu/full/1990me...

https://royalsocietypublishing.org/do...