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Cast (14)
David Attenborough
as Self - Narrator (archive sound)
Sean Carroll
as Self - Narrator (archive sound)
Craig Childs
as Self - Narrator (archive sound)
Professor Brian Cox
as Self - Narrator (archive sound)
Alex Filippenko
as Self - Narrator (archive sound)
Stephen Hawking
as Self - Narrator (archive sound)
Michio Kaku
as Self - Narrator (archive sound)
Lawrence Krauss
as Self - Narrator (archive sound)
Janna Levin
as Self - Narrator (archive sound)
Phil Plait
as Self - Narrator (archive sound)
Martin Rees
as Self - Narrator (archive sound)
Michelle Thaller
as Self - Narrator (archive sound)
Neil deGrasse Tyson
as Self - Narrator (archive sound)
Mike Rowe
as Self - Narrator (archive sound)
