How earthquakes and lightning help explain squeaky sneakers

Nature

by Nick Petrić Howe

February 26, 2026

AI-Generated Deep Dive Summary

High-speed footage has revealed an intriguing connection between tiny lightning-like sparks and the squeaks made by sneakers. According to a study published in *Nature*, when friction builds up between shoe soles and surfaces, static electricity can accumulate, leading to minuscule electrical discharges—similar to lightning—that cause the familiar squeaking sound. This discovery not only sheds light on everyday phenomena but also ties into broader scientific concepts like earthquake mechanics and materials science. The research highlights how these tiny electric sparks, or "triboelectric" events, occur when electrons are transferred between molecules during friction. By analyzing high-speed video footage, scientists observed that the squeaks result from a rapid release of stored energy in the form of light and sound. This phenomenon is similar to processes seen in nature, such as earthquakes, where stress builds up along fault lines until it’s abruptly released. In another groundbreaking finding, evidence of hippocampal neurogenesis—the production of new neurons in the hippocampus—has been confirmed in humans. Long debated among scientists, this discovery could have significant implications for understanding brain function and treating conditions like Alzheimer’s disease. The study provides direct evidence that the human brain can generate new neurons throughout life, challenging previous assumptions and opening doors for potential therapies targeting neurodegenerative diseases. These findings are not just scientific curiosities; they have real-world applications. Understanding tribological phenomena could lead to advancements in materials science, helping to reduce noise pollution or improve the durability of surfaces and equipment. Meanwhile, insights into brain plasticity and neurogenesis could revolutionize approaches to treating mental health disorders and age-related cognitive decline. For readers interested in science, these discoveries underscore how even seemingly

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Originally published on Nature on 2/26/2026