Why parents are letting their babies sleep in sub-zero temperatures

Although this is definitely not one we recommend trying at home, generations of parents in Scandinavia have been letting their babies sleep outside in temperatures below freezing - albeit wrapped in blankets and warm clothing.

According to the BBC, the practice is believed to have started in the 1940s when air quality inside the home was poor and letting the baby sleep outside was thought to help stave off rickets and improve their immunity to germs.

Parents report that their babies sleep better and longer outside and that afterwards they are more active and ate better.

While scientific evidence on the efficacy of outside napping appears inconclusive, many parents in Finland and the Nordic countries continue to do it.

More: This video shows why it's impossible to get anything done when you have a toddler