What's the Biggest Canyon on Earth?

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/20090110132654/http://walrus.wr.usgs.gov/reports/reprints/Normark_GSA_SP370.pdf

https://www.statista.com/statistics/253878/number-of-visitors-to-grand-canyon-national-park/#:~:text=The%20number%20of%20recreational%20visitors,in%20the%20last%20seven%20years.
http://www.ccpo.odu.edu/~klinck/Reprints/PDF/ronaDSR2015.pdf

https://pubs.usgs.gov/of/1996/ofr96-491/pdf/01_ofr96-491.pdf

http://www.19thcenturyscience.org/HMSC/HMSC-Reports/1912-Murray/htm/doc.html

http://adsabs.harvard.edu/full/1990mevt.conf..314W

https://royalsocietypublishing.org/doi/10.1098/rspb.2010.0462

Видео What's the Biggest Canyon on Earth? канала Atlas Pro