Here's an article that says that over sleeping shortens lifespans:
https://www.allure.com/story/oversleeping-shortens-lifespan
Or human longevity is related to regular sleeping cycles:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4067693/
Or why you should stop sleeping in on the weekends:
http://www.iflscience.com/health-and-medicine/sleeping-weeke...
Did you know that more than 8 hours of sleep is bad for you?
https://www.medicalnewstoday.com/releases/7333.php
Here's an article that says that over sleeping shortens lifespans:
https://www.allure.com/story/oversleeping-shortens-lifespan
Or human longevity is related to regular sleeping cycles:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4067693/
Or why you should stop sleeping in on the weekends:
http://www.iflscience.com/health-and-medicine/sleeping-weeke...
Did you know that more than 8 hours of sleep is bad for you?
https://www.medicalnewstoday.com/releases/7333.php