“UCL, in collaboration with audiobook giant Audible, measured the physical reactions of 102 participants aged between 18 and 67 to audio and video depictions of scenes from [well-known] books … According to the study, while the participants reported that the videos were “more engaging” than the audiobooks by about 15% on average, their physiological responses told a different story, with heart rates higher by about two beats a minute, and body temperatures raised by roughly two degrees when listening to audiobooks.”