New study finds Mars's liquid iron core is smaller and denser than previously thought

For four years, NASA's InSight lander recorded tremors on Mars with its seismometer. Researchers at ETH Zurich collected and analyzed the data transmitted to Earth to determine the planet's internal structure. "Although the mission ended in December 2022, we've now discovered something very interesting," says Amir Khan, a Senior Scientist in the Department of Earth Sciences at ETH Zurich.