Freezing rain, low temperatures and strong thunderstorms were forecast elsewhere in the Midwest.

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My testing of that car was performed in winter conditions, in low temperatures (well below freezing) and often at highway speeds (occasionally, beyond).

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Getting these is tricky, but the researchers hope that cryopreservation that is, deep-freezing at extremely low temperatures will preserve them indefinitely, once they have been obtained.

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Arctic ground squirrels survive body temperatures as low as 27 degrees Fahrenheit without freezing, during their long hibernation in the permafrost.

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At the time of the crash there was low cloud, poor visibility and patches of freezing fog.

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"In wintertime, the cliff surface gets so cold that its temperature falls below the freezing point of CO2, which at low pressure goes directly to solid, " said Dr Musselwhite.

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You can either pull it up high and cover your upper half, in which case your feet will get cold, or you can leave it low, have toasty feet, but find yourself freezing further up.

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