Written & Researched by Leila Battison. Check out her channel:-
   / @somethingincredible  
Script & video edited & by Pete Kelly. Check out his channel:-
   / @petekellyhistory  
Narrated by David Kelly. Check out his channel:-
   / @voicesofthepast  

Thumbnail Art by Ettore Mazza
Artwork by Eduardo Valdez

References:-
https://lowell.edu/history/
https://lowell.edu/wp-content/uploads...
https://www.census.gov/history/pdf/ma...
https://www.nasa.gov/content/blue-mar...
https://nssdc.gsfc.nasa.gov/planetary...
https://www.usgs.gov/special-topic/wa...
https://royalsocietypublishing.org/do...
https://royalsocietypublishing.org/do...
https://royalsocietypublishing.org/do...
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://web.archive.org/web/201110090...
https://www.space.com/17048-water-on-...

Image sources:-
Iván Éder / CC BY-SA (http://creativecommons.org/licenses/b...)
By Percival Lowell - Яков Перельман - "Далёкие миры". СПб, типография Сойкина (English transliteration: Yakov Perelman - "Distant Worlds". St. Petersburg, Soykin printing house), 1914., Public Domain, https://commons.wikimedia.org/w/index...
By Mariner 4 - NASA, Public Domain, https://commons.wikimedia.org/w/index...
By Unknown author - Reconstructed from several online sources by Joe Haythornthwaite, Public Domain, https://commons.wikimedia.org/w/index...
By John Evans and Howard Periman, USGS - http://ga.water.usgs.gov/edu/watercyc..., Public Domain, https://commons.wikimedia.org/w/index...
NASA/Goddard Space Flight Center
By ESA - European Space Agency & Max-Planck Institute for Solar System Research for OSIRIS Team ESA/MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA - http://www.esa.int/spaceinimages/Imag..., CC BY-SA 3.0-igo, https://commons.wikimedia.org/w/index...
By European Southern Observatory / M. Kornmesser - https://www.eso.org/public/images/eso..., CC BY-SA 4.0, https://commons.wikimedia.org/w/index...
By Iván Éder - http://www.astroeder.com/digital/C17P..., CC BY-SA 3.0, https://commons.wikimedia.org/w/index...
https://en.wikipedia.org/wiki/Mariner...
By Frank E. Schoonover (illustration) - Here, Public Domain, https://commons.wikimedia.org/w/index...
By Henrique Alvim Corrêa - drzeus.best.vhw.net, Public Domain, https://commons.wikimedia.org/w/index...