Entomologist Martha Weiss received a letter from a Japanese boy wanting to replicate her study. This study, previously featured on Radiolab, explored insect life and broader questions about memory and transformation. The boy's initiative spurred a remarkable series of events advancing Weiss's original research. Her daughter, Annie Rosenthal, documented these events in an audio story, "Caterpillar Roadshow." This story was published in the new audio magazine, Signal Hill, co-created by former Radiolab interns. Radiolab is presenting an excerpt of Rosenthal's work. The episode credits numerous individuals involved in its production and fact-checking. Listeners can access the original Radiolab episode and the Signal Hill podcast online. The production acknowledges its sponsors and encourages listener support and engagement. Radiolab's science programming is supported by various foundations.