The first 100 people to use code SCIENCE at the link below will get 60% off of Incogni: https://incogni.com/science

Spools can behave in counter intuitive ways. The puzzle get's even weirder in the limit as the spool gets full, and then goes beyond full!

Check out the Physics Girl video here:    • SPOOL RIDDLE - Which way will it roll?  

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

You can support me on Patreon and get access to the exclusive Discord:
  / stevemould  

just like these amazing people:

Tj Steyn
Pavel Dubov
Lizzy and Jack
Jeremy Cole
Brendan Williams
Alan Wilderland
Frank Hereford
Lukas Biewald
Damien Szerszinski
Heather Liu
Grant Hay
John Zelinka
Paul Warelis
Matthew Cocke
Nathan Blubaugh


Twitter:   / moulds  
Instagram:   / stevemouldscience  
Facebook:   / stevemouldscience  
Buy nerdy maths things: http://mathsgear.co.uk