We cannot know where this foolish, reckless attack will end - but new hatreds will be seeded, terrorist vendettas sown and, ultimately, little will be achieved, says Guardian foreign commentator Simon Tisdall ...
Forget snake yoga. All it takes to increase your life expectancy is factoring a set of simple exercises into your weekly routine, says Prof Devi Sridhar, chair of global public health at the University of Edinburgh ...
In the past he has been urged to follow strategies that don't really match his core beliefs. That's changing, as it must, because he knows the clock is ticking, says the prime minister's biographer, Tom Baldwin ...
Encounters with great art can be absorbing, unsettling and even painful. How has this been tamed into 'reading for pleasure', asks Charlotte Higgins, the Guardian's chief culture writer ...
Got battered at the polls? No problem. Just act like voters want more of what you're selling - not considerably less, asks Guardian columnist Marina Hyde ...