Mystery hunters converged on a Scottish lake on Saturday to look for signs of the mythical Loch Ness Monster. The Loch Ness Center said researchers would seek evidence of Nessie using thermal-imaging drones, infrared cameras and a hydrophone to detect underwater sounds in the lake’s murky waters. The two-day event is being billed as the biggest survey of the lake in 50 years and includes volunteers scanning the water from boats and the lakeshore, with others around the world joining in with webcams. Alan McKenna of the Loch Ness Center said the aim was “to inspire a new generation of Loch Ness enthusiasts.” McKenna told BBC radio the searchers were “looking for breaks in the surface and asking volunteers to record all manner of natural behavior on the loch.” “Not every ripple or wave is a beastie. Some of those can be explained, but there are a handful that cannot,” …