The only rhythm change is during the bridge where the rhythm becomes straighter and you play two chords per bar over the first two bars (A and E to F#m and E), before a bar of D and a bar of B7.

After 12 years of research, scientists analyzed 636 recordings of vocalizations from 39 adult indris and found they share two different rhythmic patterns with humans. Like us, lemurs are primates.

It seems that we get accustomed to, and come to prefer, the rhythmic patterns in the music that we grow up hearing. For example, in most music of the West, beats are regular and related by simple ...