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LINKS and SOURCES below.

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Music by Jake Chudnow
www.soundcloud.com/jakechudnow
www.youtube.com/jakechudnow

Veritasium video on single photons and frog eyes: www.youtube.com/watch?v=cztocbHiiqQ

British Pathe Robert Wadlow video: www.youtube.com/watch?v=5McWw03Ryrs

Earth Unplugged channel: www.youtube.com/user/EarthUnpluggedTV

AsapScience Moon Illusion video: www.youtube.com/watch?v=49RztN4Bqu0

interactive DNA model: learn.genetics.utah.edu/content/begin/dna/builddna/

Igor Vovkovinsky: www.thetallestman.com/igorvovkovinskiy.htm

Sultan Kösen: en.wikipedia.org/wiki/Sultan_Kösen

Robert Wadlow: en.wikipedia.org/wiki/Robert_Wadlow

André the Giant:

twentytwowords.com/2012/01/26/andre-the-giant-holding-a-can-of-beer/
en.wikipedia.org/wiki/André_the_Giant

tallest woman: www.thetallestman.com/zengjinlian.htm

human height:

io9.com/5789332/in-search-of-the-worlds-tallest-human
erinjenne.blogspot.co.uk/2011_02_01_archive.html
webcache.googleusercontent.com/search?q=cache:lL-vNccMG8MJ:www.naturalheightgrowth.com/2012/09/20/what-is-the-tallest-theoretical-height-of-the-human-species/