News that doing brainteasers can send you gaga in later life has been greeted with dismay by the puzzle publishing industry.
Research at Chicago's Rush University has shown that while puzzling can slow the decline in our thinking ability at first, in later life it can actually speed it up.
Publisher of several monthly puzzle magazines, Nat Sudoku, said: "This could be extremely damaging to the industry. It's bound to hit sales of our publications."
Ben Wibble, who has set puzzles for newspapers and magazines for years, told us: "Hurricanes hardly happen but gibber. Have you seen the flowers in my garden?
"I like to go to Blackpool - with His Highness the Emperor, of course, sir!"
