Steam Whistle

Dr. Gary Joiner / Dr. Gary Joiner

Scientists today are trying to harness the sun to make steam energy more efficient in producing electricity from renewable sources. Commentator Gary Joiner has a history lesson on steam. 

Gary Borders
Gary Borders / Gary Borders

When commentator Gary Borders received a K-4 whistle in the mail, he didn't know what to make of it? He explores the history of this polished brass whistle -- that still works!