A groundbreaking discovery in the energy transition field has revealed the presence of natural hydrogen hidden beneath the Earth's surface. This discovery challenges the long-held belief that Earth lacked natural hydrogen, with recent findings showing traces of it in various locations like the ocean floor and continental crust. The potential of natural hydrogen as a low-carbon alternative to grey hydrogen, which is derived from fossil fuels, has sparked interest in decarbonizing economies. Projects are rapidly developing in different countries like Australia, the United States, and France, where permits have been issued for exploration of potential hydrogen reserves. The discovery of a significant 46 million-tonne reserve in the Moselle region further emphasizes the growing interest in natural hydrogen. In a major breakthrough, researchers from Oxford University, Durham University, and the University of Toronto have published findings elucidating how and where natural hydrogen accumulates in the Earth's crust. The research, featured in the journal Nature Reviews Earth & Environment, highlights the enormous potential of natural hydrogen to cater to global energy needs for the next 170,000 years. The study showcases a map indicating Earth's crust regions likely to contain hydrogen, though commercial viability is yet to be determined. Understanding the formation and extraction of natural hydrogen has been a longstanding challenge, but recent advancements in research on gas formations have provided insights into the process. While there are still unanswered questions about the reactions and geological conditions that lead to hydrogen formation, the scientific community remains optimistic about leveraging natural hydrogen as a vital energy resource for the future.