More from Chalkdust

Headscratchers
We review the eighth of this year's nominees for Book of the Year
Page 3 model: To betray or not to betray?
That is the question
Surfing on wavelets
Johannes Huber explores the maths behind how image compression works.
Top Ten: Geometry instruments
The definitive chart of the best tools
Top Ten vote: Colours of chalk
Vote for your favourite colour of chalk for Issue 04: is it white, yellow, or the Post Office Tower?
Why is it so hard to pull two phone books apart?
Take two phone books and interleave all their pages one by one. Now try and pull them apart by their spines. Impossible, right?
