Most people love or hate a bonfire. It's unusual to quite like them. Some people aren't allowed them (Londoners, on health grounds). Others can only have them if they are land-rich (people from Connecticut need at least an acre of land, to protect the neighbours). But we country bumpkins in Middle England can muddle along how we like. Science with Peter has set up camp over at the Guardian and Observer allotment blog this week, and the theme is fire heaps, or bonfires. The Guardian likes a good row, so do join in. Just check for hedgehogs first.