Wider landscapes for the environment theme- Frozen Planet

Martin Leggett, Arctic sea-ice loss lets Pacific sea-life into Atlantic, 26/06/11, http://www.earthtimes.org/climate/arctic-sea-ice-loss-lets-pacific-sea-life-atlantic/1076/

unknown, His Dark Materials: Northern Lights in Google Earth, http://www.juicygeography.co.uk/northernlights.html