The human brain uses a significant amount of energy which the rest of the body gets from food. In cold places a large proportion of the energy gained is used to keep the body at 37C - claerly a struggle when the air is well below 0C.

Under extreme circumstances the amount of energy to the brain is reduced. This reduces the efficiency of the brain. Could this and the currnt climate in the north of the planet explain why people are inclined to put forward ideas which are clearly daft?

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