The mattresses are made from visco-elastic foam, a NASA padding innovation that is temperature-sensitive and softens to conform to the shape of the sleeper's body.

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The density record of temperature-sensitive white spruce for this region showed extremely low values in the summer of 1783, known in Inuit lore as "the summer that did not come".

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For now, aeroplanes and rotors are not slathered routinely with temperature-and pressure-sensitive paints because their sensitivity needs to be improved.

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They are a temperate-climate crop, sensitive to temperature changes and requiring four distinct seasons.

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