PhysicsCan complexity theory explain Egypt's crisis? Warnings about close coupling in a globalised economy are coming true in Egypt – will the politics of complex systems topple more governments? News
LifeThe wisdom of herds: How social mood moves the world Why do share prices, skirt lengths, even the state of the European Union, fluctuate so wildly? It's down to social mood, says John Casti, and we must heed its messages Opinion