In this episode of Tumble Science Podcast for Kids, hosts Lindsay Patterson and Marshall Escamilla answer six-year-old listener Ayla's question about why humans have five fingers. They speak with Dr. Jessica Whited, an associate professor of stem cell and regenerative biology at Harvard University, who studies axolotls and limb regeneration. The episode covers how human fingers develop in the womb via limb buds, the evolutionary origin of five-fingered limbs, and how axolotls form a blastema to regrow lost limbs. Dr. Whited explains how understanding axolotl regeneration could one day help humans regrow fingers and limbs using signal-impregnated bandages that trigger blastema formation. The episode ends with a call-to-action for kids to imagine other animals whose transformative abilities could inspire future science.
