This bonus content is a reading from Platypus, the CASTAC Blog. The full post by Aylar Abdolahzadeh can be read at https://blog.castac.org/2026/06/tracing-the-legacy-of-human-resilience-in-the-debris-of-ancient-campfires/. About the post: Have you ever made fire from scratch, without matches or charcoal? In the summer of 2015, I tried to recreate fire using flint, pyrite, and tinder. It quickly became clear that making fire is a learned skill that requires patience, observation, and practice but igniting fire was only the beginning because keeping that fire alive took even more effort. As an archaeologist, this experience led me to ask how our ancestors used, made, and maintained fire as a skill or catalyst. I began collecting, analyzing, and experimentally studying ancient fire traces, such as heat-altered stone tools, from sites across Europe and Southwest Asia. What I found was unexpected: despite the remarkable adaptability of our ancestors across time and space, fire use was far less consistent than I had assumed. Instead, it varied depending on where people lived and what their environments offered in terms of clima (This episode is available in additional languages on Platypus, The CASTAC Blog.)