The Middle to Late Stone Age transition is a changeover between two African archaeological periods defined by a rise in art and symbolism, new stone tool technologies, and increasing cultural exchanges. At the same time, humans were dispersing out of Africa and into Eurasia. Finding dates, or establishing a chronology, of the Stone Ages is critical to understanding the timing and tempo of human occupation, movement, and dispersal. Ostrich eggshells found at archaeological sites provide a way to date sites that may be too old to date (> 50,000 years ago) with traditional methods like radiocarbon dating. 230Th/U burial dating is a relatively new method that dates the time of eggshell burial. In this video, I describe the life history of an ostrich eggshell. The first part of the video describes how OES are collected by humans, how they're used as a bead or food source, and how they're eventually left behind. The second half the video explains how OES are systematically collected by archaeologists, brought to our lab, and analyzed first through laser ablation inductively coupled plasma mass spectrometry (LAICPMS) to find its suitability for dating. And then, finally, how it is dated through a multicollector inductively coupled plasma mass spectrometry (MCICPMS) and HOW that date can give us a better understanding of the the timing of human occupation at an archaeological site.