Extinct animals hold a unique place in our collective imagination. Their stories remind us just how fragile life on Earth can be, and how easily entire species can vanish forever. Whether remembered in folklore, depicted in art, or studied by scientists, these lost creatures echo through time, urging us to reflect on both our past actions and future responsibilities. This article embarks on a journey through 15 extraordinary species—animals whose disappearances still captivate, sadden, and inspire us in ways that transcend generations.