He called on one of the crew and together they managed to get the stove burning in the hope that it would give off enough heat to warm the cabin above freezing point.
Experiments conducted on yeast and garden worms show neither can survive extreme cold, with 99 percent dying after spending 24 hours in temperatures just above freezing.
People can even develop hypothermia at temperatures above freezing if it's raining.
This afternoon's sunshine could nudge the temperature above freezing.
On a cloudless night, frost may form on horizontal surfaces even when the temperature of the air is above freezing.
Groundhogs spend the winter hibernating in a specially dug hibernation burrow, their breathing and heartbeats slowed to a snail's pace, their body temperatures not too far above freezing.
The fuel tank is on the side of the sun, the temperature in the tank is above freezing point, and the fuel is still in liquid state.
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