Mark Twain
On the centenary of his death, we look at the life and work of the great novelist and ask if he remains America's most important writer.
Seven Wonders of the Solar System
A portfolio of awe-inspiring photographs detail the Milky Way's most extraordinary sights and amazing phenomena.
The Hit Factory
As the new series of American Idol lights the way for another bunch of hopefuls, scientists try to usurp the panel of judges by developing software that predicts hits in seconds.
Life
On location with the world's top nature movie-makers as they film the dish that leaves the sea to fly to safety and the cunning dragons who take weeks to bag their prey.
PLUS: The Science of the Winter Olympics, The End of History, Black Mambas and Pakistan's holy war.
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As the eyes of the world turn to Vancouver for the greatest winter show on Earth, BBC Knowledge examines the physics that help these elite athletes get physical in the snow. Find out how freestyle skiers get in a spin, why friction makes sure no curling stone is left unturned how speed skaters become the fastest thing on two blades. It’s all in issue 10 of BBC Knowledge.