From identity symbols to signalling tools, why human societies are fascinated by flags
The latest understanding of Comet 67P from Rosetta’s instruments
A special report on how technology has influenced the evolution of democracy
Will Pakistan’s new promise to "eliminate" militants be met?
Geoff Watts continues his exploration of the science and culture of gossip
Experiences from the UAE's first female surgeon and the Polish face transplant specialist
How milk changed humans and humans changed milk
Solution to the mystery of the missing Mars robot Beagle2
Mike Williams asks why are we loyal, and who are we really loyal to?
NASA's New Horizons probe gets set to examine Pluto after a 9 year trip