Unicorns. Not usually the kind of mythical thing you'd think a travel writer would be on assignment to find.  Yet in the Canadian Arctic of the territory of Nunavut, on Baffin Island, a sea creature who inspired these fabled creatures lingers beneath the waves. We're talking the narwhal - a small whale that sports a twisted ivory tusk that to this day still baffles scientists. Accompanied by her Inuit guides Phoebe battles whiteouts and icy seas on a mission to find these marina mammals. Along the way she climbs icebergs, learns how to track polar bears and is privileged to hear, first hand, the indigenous legends of the creation of the first narwhal. Will she find one? There's only one way to find out... Also coming up: How to keep your batteries and devices going in cold climates - with this month's travel hack; Discover 10 flying alternatives for your next adventure; fresh from launching his new BBC series Wilderness, I meet TV presenter and author Simon Reeve, to talk wild places, his ultimate travel gear and... testicles?  In our regular gear chat you can learn all about the joy of using gaiters (the little shoe and boot covers that can make all the difference);  join us for a heart-to-heart with ice swimmer Kate Steels who shares some of the best swimming spots around the planet; and prepare to be amazed by our Wander Woman of the Month - Brigid of Ireland. www.Phoebe-Smith.com; @PhoebeRSmith