Arctic sea ice acts as a natural air conditioner that keeps the planet from overheating. But this ice, covering the northern most tip of our planet, is melting away more and more each summer, under the heat of global warming.
If you experience technical problems viewing this video please download the latest Adobe Flash Player.
Midges have been blighting summers in the Scottish Highlands for generations, but new research suggests that the insects aren't as indiscriminate in their choice of victims as previously thought.