I'm no expert in this subject, But I have learned a little something about the stone ape theory(more of a hyposthesis than a theory)

Since I am a huge nerd I like to look at things with the little science knowledge that I have. So basically the M string theory is a theory that is trying to unify all of the laws of the cosmos and the quantum world. because as you know the same laws that govern the cosmos collapse when applied in the quantum world. This theory states that there are strings that vibrate in different frequencies and they are the fundamental building blocks of the universe, there are also 12 dimensions that we live in, 4 being the most common( length width height and time) but the others are so small their imperceptible. Maybe our mind lives on the 5th dimension and using these "drugs" can help us create a bridge between dimensions. OR maybe I smoke too much weed