Einstein's 'biggest blunder', his proposal that the universe is not static, was a step towards discovering dark energy.
18 Sep 2011 11:09 GMT
A ski industry has sprung up in the remote alps of Afghanistan. But will this enterprise survive a resurgent Taliban?
Filmmaker Joshua Oppenheimer on documenting Indonesia's killings of 1965 through the eyes of perpetrators and victims.
Indonesia, Crimes against humanity, Genocide
People and Power goes on the trail of a Somali army commander accused of involvement in mass killings and war crimes.
War & Conflict, Africa, Somalia
One young Iranian woman challenges her family and traditional values as she dreams of becoming an astronaut.
Arts & Culture, Iran, Space