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Babies left to sleep outdoors to strengthen their immune systems in Moscow, 1958.
In the Soviet Union and across parts of Northern Europe, parents believed fresh cold air helped babies sleep better and stay healthier. The unusual practice became especially common during the
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Babies left to sleep outdoors to strengthen their immune systems in Moscow, 1958.
In the Soviet Union and across parts of Northern Europe, parents believed fresh cold air helped babies sleep better and stay healthier. The unusual practice became especially common during the mid-20th century and still exists in some Nordic countries today
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