The document discusses the differences between the left and right brain hemispheres. It explains that the left and right halves of the brain control different functions in the body and influence behaviors. It was interesting to learn that being left-handed or right-handed corresponds with having a more developed right or left brain hemisphere, respectively. The document also notes that using both brain hemispheres simultaneously, such as playing the piano and talking at the same time, can be difficult. Overall, the reading provided curious details about brain lateralization that the author found interesting.