Why do we need total darkness to sleep? | Why's in the World

The word "darkness" often has negative connotations, but did you know it has a fascinating influence on our sleep patterns? Let's uncover the secrets to maintaining optimal sleep hygiene. Subscribe to our official YouTube channel, https://bit.ly/2ImmXOi Be the first to know about the latest updates on local and global issues, news and current affairs, 911-UNTV Rescue and public services. We Serve the People. We Give Glory To God! #UNTV #UNTVNewsandRescue For updates, visit: https://www.untvweb.com/news/ Check out our official social media accounts: https://www.facebook.com/UNTVNewsRescue https://www.twitter.com/untvnewsrescue https://www.youtube.com/untvnewsandrescue https://www.tiktok.com/@untvnewsandrescue/ Instagram account - @untvnewsrescue Feel free to share but do not re-upload.