I remember when a Swedish couple did that in NYC and got arrested

Depends on how the baby is dressed. Inuit babies used to sleep in ice houses.

I think in general, most people (babies and adults) sleep better in a cool environment. Note that the babies are fully bundled up and this is done on cold, but otherwise pleasant days.

Subzero temperatures retard bacterial growth all the time---so, what´s wrong with this?

I like my bedroom cold and my bed warm. Hence the electric blanket. This does seem a bit weird but obviously it works for them. Back in the "old days" women would leave their babies outside while they went in to shop. Now that really seems weird and dangerous to me. I cannot imagine leaving a baby outside while I picked over the oranges but I know it was common at one time.

Vitamin D!! This may be unnessary now due to decent diets in the West, but my Mom even talks about how the women of her mother´s generation (just before the WWII gen.) used to wrap infants up and put them on the porch during the day to get some vitamin D. Rickets (Vitamin D) deficiency, used to kill many infants. this would be especially noticable in the far north countries. think about it

I think such acts are against the law in most states. For one reason, you might return to find you baby has been stolen.

Do that in this country and you will spend a few years in the graybar hotel, have to register as a sex offender, and spend the rest of your life paying off the defense lawyers. That is if someone doesn´t steal the kid.

Oh the humanity!

My grandmother always slept with her bedroom window slightly open, no matter how cold. She said it was healthier and she did live to 89 while smoking since the age of 14 so maybe she was onto something.

Most of the Nordic types I know are a hardy lot who come from long-lived families.

I like the quote FTA attributed to Swedes: "There is no bad weather, only bad clothing."

I´d rather sleep in the cold any day.

When my children were babies, and they´d have a bad cold, the doc told me to wrap them up and bring them outside on the porch and sit out there for an hour.

The cold temps reduce swelling in the nasal area and helps them breathe. To this day when my kids have a cold, I tell them to go outside. The boys will play basketball and come in feeling better.

Decades ago I worked with a woman who was born in Germany. Her mother babysat the kids and like her mother, she believed that as long as it wasn´t raining or snowing, the children should nap outdoors. One winter day she go a call at work from her local police department, a neighbor reported granny. My coworker was not pleased, with the cops that is.

I used to bundle up my babies and toddlers in the winter and take them for hour-long walks if the sun was shining steadily. The temperature was usually below freezing and the humidity was low.
One thing I made sure of was that their mittens were connected by a string up their arms and around the back of their necks...and that the mittens stayed on each hand. Every few minutes: Head count and hand check!
The Vitamin D thing might have something to do with the fact that my children got fewer colds in grade school than the average. So did I!

I think fresh air, even cold, is good for us while sleeping. I am spoiled now and it will be hard for me when we get back home to Texas where I will have to live in AC. #11 I think there is something to that. Good for those parents. It´s not the weather, it´s if one is properly bundled up!

# 6 Back then they took cod liver oil.
Bleeeek.