Could an ancient Indian breathing technique usher ... found that on the night of the full moon, it takes people, on average, five more minutes to fall asleep. Syda Productions – stock.adobe.com ...

Could an ancient Indian breathing ... that a full moon has been known to reduce sleep time, impact the hours of deep sleep in a sleep cycle, and increase the time it takes to fall asleep.

When he was still a human, he used the moon breathing technique, which was a derivative of his brother's Sun Breathing technique. The cast of Demon Slayer is made up of some pretty unique characters.