Summary:
- The article discusses the possibility that primordial helium from the formation of the solar system may be trapped in the Earth's core.
- Researchers have found evidence that the Earth's core contains a higher concentration of helium-3, a rare isotope of helium, compared to the rest of the planet.
- This suggests that the Earth's core may have retained some of the primordial helium that was present during the solar system's formation, providing insights into the early history of our planet.