Why is the pentatonic scale found in so many different parts of the world?

Maybe it has something to do with the kind of vibrations that the human brain likes?
Vibrations that blend together well.
The music has developed over thousands of years.
As human beings have evolved so has their music.

Can you see how these Major and Minor Pentatonic scales use the same notes?
Is the difference the starting note or key note?
Does this mean the pattern of intervals from the key note is different?
Does that give one of the scales a Major sound and the other a Minor sound?
Is the name of the scale different too?

HINT:
Check out the letter names of the top scale with the one underneath.
Check out the keys used (look at where the groups of 2 & 3 black keys are).

The pentatonic minor scale uses the same group of notes as the major but the starting note is different.
This means that the interval between the 1st & 2nd notes are the sadder sounding minor 3rd.

Try out these patterns. Repeat them until they sound like cool riffs.
TIP: the ' signe after a note means it's the higher one.

The Blues scale developed from the minor pentatonic. In fact it is a pentatonic minor scale with one extra note added for expression. Compare this scale with the pentatonic minor on A.

When you are ready test yourself with the