It's not advisable, and it's not always safe, but passing out drunk happens sometimes when people over-indulge – having so many drinks their bodies just can't handle it, leading them to sink into bleary unconsciousness. The hangover could be far worse than a sore head the next morning, scientists now report in a new study. A massive review of previous research examining the drinking history of over 130,000 people suggests that getting blind drunk stands to double people's risk of developing dementia later in life. While the associations between excessive alcohol consumption and dementia are well documented, there nonetheless remains...