Mass Extinction: Life at the Brink is a 2014 English-language Documentary film. This program describes the detective work and evidence for the generally accepted causes of two of the five mass extinctions, the KT and Permian. Then follows a diatribe on the speculation that human civilization may cause the sixth mass extinction. Written by David Foss. Mass extinction: life at the brink stars Tian Wang in the title role. It was released on 30th November 2014.