A new study from Science Daily finds that people who are more optimistic sleep better and longer throughout the night based on an analysis of 3,500 young to middle-aged participants. Well now I know why I stay up so late and feel horrible every morning!

Optimistic people sleep better, longer, study finds
People who are the most optimistic tend to sleep better and longer, suggests a new study. The study included 3,500 young and middle-aged adults in four US regions.
Buddy the Elf, what's your sleep schedule?
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