I feel if there is no evidence or proof of something that it does not exist. Unless we all agree upon its existence through evidence.
For example we We SAY that 0 is the middle but it's not necessarily something tangible or physical. It's just something that (we all agree on), like universally 1 inch is 25. 4 mm and it's not going to change until we abandon metric and imperial measurements.
We all need evidence in order to believe in its existence.
Nature sound machines provide calming input to your senses. Wouldn't it be nice to relax or fall asleep to the sound of a babbling brook, methodical drops of rain, a soothing campfire, or the gentle s…