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Bill Nye schools climate-change deniers 06:40
Pat Robertson's lost in space theory 01:18
Top Lines: GOP’s war on polar vortex science 07:12
Cold weather brings climate change deniers 03:05
Midwestern polar apocalypse 06:13
Deep freeze heats up climate change-deniers 07:58
Climate change-deniers need a reality check 02:03
Right mocks rescued climate scientists 14:08
There's global warming - and it's snowing 10:17
Climate deniers can't deny new record storms 06:46
Climate deniers find pushback in Nebraska 19:01 Walker leads Republican pack in Iowa 04:28 Scott Walker holds onto an early lead in Iowa's first-in-the-nation GOP presidential caucus. How's he doing it? Ed Schultz, Ruth Conniff and Matt Schlapp talk it out. May 6, 2015
Read More UP NEXT
Bill Nye schools climate-change deniers 06:40
Pat Robertson's lost in space theory 01:18
Top Lines: GOP’s war on polar vortex science 07:12
Cold weather brings climate change deniers 03:05
Midwestern polar apocalypse 06:13
Deep freeze heats up climate change-deniers 07:58