Many of us can appreciate the complexity of classical music (not while driving, because some of us suffer from severe carcalepsy and will crash and die immediately upon switching to the classical channel). That appreciation can be monitored with functional MRIs (fMRI), which measures brain activity by detecting fluctuations associated with blood flow.
These fluctuation patterns are different depending on if you're listening to basic sounds or music.
Thanks to some very careful and brave researchers, we now know that crocodiles differentiate between basic sounds and music (probably didn't need science for that). The interesting part of these findings are that brain patterns of crocodiles in response to classical music was similar to that of birds and mammals. These measurements were taken in response toBach’s Brandenburg Concerto No. 4 to be exact.
This may seem like an odd study, but these findings mean that brain response to stimuli may have have evolved much earlier than scientists thought.