Get 68% off for a 2-year plan + 1 month free with this link: https://nordvpn.com/steve and use the promo code "steve" to get the first month free.

Torsional eye movement, known as cycloversion and cyclovergence have a fascinating evolutionary history via our evolutionary ancestors that had eyes on the sides of their heads. Your eyes twist in this way whenever you tilt your head!

You can buy my books here:
https://stevemould.com/books

You can support me on Patreon here:
https://www.patreon.com/stevemould

just like these amazing people:

Joseph Galliera
Nathan Williams
Matthew Cocke
Glenn Watson
Mark Brouwer
Joseph Rocca
Joël van der Loo
Doug Peterson
Yuh Saito
Rashid Al M

Twitter: http://twitter.com/moulds
Instagram: https://www.instagram.com/stevemouldscience/
Facebook: https://www.facebook.com/stevemouldscience/
Buy nerdy maths things: http://mathsgear.co.uk