Summary:

- NASA's InSight lander has detected hundreds of marsquakes since landing on Mars in 2018, providing new insights into the planet's interior structure and evolution.

- The marsquakes have helped scientists solve a 50-year-old mystery about the thickness of Mars' crust, revealing that it is thinner than previously thought, with significant variations across the planet.

- This information about Mars' internal structure and composition can help scientists better understand the formation and evolution of terrestrial planets like Earth and Mars, and potentially provide clues about the potential for past or present life on the Red Planet.