Cities like Chicago, Buffalo, Cleveland and Milwaukee contend with a clash of many types ... surfing with warm weather, Great Lakes surfing requires a different alchemy: potent wind.

Warm-up: Marching and jogging to the beat - on the spot and then travelling. Sequence 1: Wind-surfing. Dragging the surfboard into the water. Paired counter-balance to lift the sail up and out of ...

Their analysis reveals that these bats use an unusual strategy to travel hundreds of miles at night - they surf the wind. 'They were riding storm fronts, using the support of warm tailwinds ...