The 2023 Nobel Prize in Physics has been awarded to Pierre Agostini, Ferenc Krausz, and Anne L’Huillier “for experimental methods that generate attosecond pulses of light for the study of electron dynamics in matter.” This groundbreaking work has opened up new possibilities for understanding and controlling the behavior of matter at the atomic and molecular level, with potential applications in areas such as materials science, chemistry, and biology. But what are attosecond pulses, and how do they offer us a glimpse into the world of atoms?