Win a £100 Maths Gear goody bag by solving our infamous puzzle
Books, business and barns are the topics readers have sent in to the professor's postbox this issue
In 2018, scientists discovered a new shape that is essential to multicellular life
How optimising the space around a circular monument is related to supereggs
The definitive chart of the circle's greatest parts
Tuesday 11 October, 7.15pm. Come along! Featuring hundreds of free copies of Chalkdust, free pizza, and the chance to purchase a Chalkdust T-shirt.
