Sunday marks the 80th anniversary of the Mackays' first sighting. Scientists consider the Loch Ness Monster a myth and the sightings purely hoaxes and wishful thinking. Many sightings of Nessie have since been reported but there is lack of evidence to prove she really exists. John Mackay and his wife saw 'something resembling a whale' as they passed the freshwater loch on a nearby road. On April 14, 1933, a couple spotted something unusual as they drove past Loch Ness - sparking 80 years of speculation and mystery.