Sir Martin Rees: Astronomer Royal : is our species in its final century?

In a taut soliloquy that takes us from the origins of the universe to
the last days of a dying sun 6 billion years later, renowned cosmologist
 Sir Martin Rees explains why the 21st century is a pivotal moment in
the history of humanity: the first time in history when we can
materially change ourselves and our planet. Stunning imagery of
cosmological wonders show us the universe as we know it now. Speaking as
 "a concerned member of the human race," Rees harkens to the wisdom of
Einstein, calling for scientists to act as moral compasses, confronting
the coming developments and ensuring our role in "the immense future."