"People have been sleeping this way for millions of years". First off mattresses and the way we sleep now are only a few hundred years old. Second we don't hav

"People have been sleeping this way for millions of years". First off mattresses and the way we sleep now are only a few hundred years old. Second we don't have detailed statistics for infant deaths until very recently so we don't know how many babies were dying a long time ago and for what causes. For evidence of the risk please see my reply below http://news.ycombinator.com/item?id=1839044 http://news.ycombinator.com/item?id=1839044