Rewind is on hiatus on Radio One for the next few months. It will return for the 75th anniversary of CBC Radio later in 2011. But you can still hear the show every day of the week on Sirius Satellite Radio 137. And every week Rewind will feature one of those shows right here on the Rewind webpage. So make sure to check us out every week.

On today's program, a feature interview with Carl Sagan.Sagan was an astronomer who become one of the first pop scientists. Through his books and on television, he brought science to the masses. From the late 60's through to the 90's, he was a powerful media personality. 

On today's program, a feature interview with Carl Sagan.Sagan was an astronomer who become one of the first pop scientists.  Through his books and on television, he brought science to the masses. From the late 60's through to the 90's, he was a powerful media personality. 

But Sagan was also a serious scientist.  He worked with NASA starting in the 1950's.  He was a professor at Cornell for over two decades.  He discovered much of what we know about the atmospheres of Venus, Jupiter and Saturn.  He advocated the scientific search for extra-terrestrial life.

Through his media appearances, Sagan popularized the terms global warming, nuclear winter and the idea that the destiny of the planet was in our hands.