Mass Effect - Rise and Fall of the Krogan

The second of a three-part series on the Krogan race from Mass Effect at IGN, this one looks at their history:

Roughly 2000 years ago the Krogan were a primitive tribal species trapped on a world suffering through a nuclear winter of their own making. They were liberated from this state by the Salarians, who "culturally uplifted" the Krogan by giving them advanced technology and relocating them to a planet not cursed with lethal levels of radiation, toxins or deadly predators.