Mystery of how kelpies herd sheep solved

Updated September 26 2014 - 10:13am, first published August 27 2014 - 11:32am
New research shows that a kelpie can herd more than 100 sheep by following two simple rules. Photo: Rohan Thomson
New research shows that a kelpie can herd more than 100 sheep by following two simple rules. Photo: Rohan Thomson

There is the riddle of the Bermuda Triangle. The unresolved identity of Jack the Ripper. The enigma of how the universe developed beyond a quark-gluon soup following the Big Bang.