NASA's scientists have designed a device that would be carefully sterilised, and would then melt its way down through the ice, allowing the melt-water to freeze behind it to prevent contamination.

ECONOMIST: Planetary pretenders

Bake for 15-20 minutes to heat through and melt the Mozzarella, then set aside for a few minutes to cool.

CNN: Frankie's parmigiana

Jasper town is nestled in the middle of the national park, where icy glaciers tumble down towering rocky peaks and melt to form wild, white water-choked rivers that cut through pine-filled valleys.

BBC: The natural wonders of Banff and Jasper National Parks