Professor McManus said the more likely explanation for the persistence of left-handedness was the need for individuals with a range of qualities and skills within societies.
The persistence of the rally has helped investors grow more comfortable with stocks after a 12-year span that saw shares suffer two of the harshest bear markets in recent memory.
There are a lot of variables, and while it can be rewarding to work it all out, success more often than not feels like dumb luck combined with aggressive persistence.
Richard Fox's achievement in winning both the 13 and 14 stone Grasmere Championships, was accomplished with great confidence, skill and persistence, as the Grasmere ring became muddier and more slippery.