What would the planet look like if the human species were to vanish? The chilling possibilities are explored in the History Channel's "Mega Disasters" episodes "Mega Freeze" (2006), revealing how climate change could wreak catastrophic changes in America, and "Mega Drought" (2007), which dramatizes how global warming could prolong devastating droughts. The provocative documentary "Life After People" (2008) employs spectacular visual effects to depict the astonishing changes that would sweep across the landscape in a chilling─and possible─future. And "After Armageddon" (2010) employs footage of Hiroshima and post-Katrina New Orleans to assist speculation on how mankind might react during an even greater disaster. 4 2/3 hrs. total on three discs. Standard; Soundtrack: English Dolby Digital stereo.