Archives by date:

December 3, 1999, Hour One: Mars Landing Preview
December 3, 1999, Hour Two: Rita Colwell and Harold Varmus
December 10, 1999, Hour One: Vision Technology
December 10, 1999, Hour Two: Science Gifts
December 17, 1999, Hour One: Earth Sciences Update
December 17, 1999, Hour Two: Science Books
December 24, 1999, Hour One: Year/Century In Review
December 24, 1999, Hour Two: Birding Bonanza
December 31, 1999, Hour One: Y2K Roundup
December 31, 1999, Hour Two: Greatest Inventions