University of California, Berkeley. Jefferson National Expansion Memorial, NPS, CC BY 2.0.
More from Chalkdust
Comic: Introduction to catalysis
If you'll open your textbook to page... oh, the cat's sitting on it
Comic: Moving
Moving house? Who you gonna call?
Borwein integrals
Aimen Khan ponders how patterns break down
Quarto in higher dimensions
Peter Rowlett is gonna need a bigger board
Adopt a polyhedron
Mara Kortenkamp, Erin Henning and Anna Maria Hartkopf give us a tour of Polytopia, a home for peculiar polytopes
Prize crossnumber, Issue 07
Win £100 of Maths Gear goodies by solving our famously fiendish crossnumber