Don Herbert, who explained the wonderful world of science to millions of young baby boomers on television in the 1950s and '60s as "Mr. Wizard" and did the same for another generation of youngsters on the Nickelodeon cable TV channel in the 1980s, died Tuesday. He was 89.
Herbert died at his home in Bell Canyon after a long battle with multiple myeloma, said Tom Nikosey, Herbert's son-in-law.

