Summary:

- The article discusses new research that suggests Mars' missing atmosphere may not have been lost to space, but rather could be hidden in the planet's surface in the form of clay minerals and methane.

- Scientists analyzed data from NASA's Curiosity rover and found evidence that Mars' atmosphere may have been absorbed into the planet's crust, forming clay minerals and methane that are still present on the surface.

- This finding challenges the prevailing theory that Mars' atmosphere was gradually stripped away by solar wind and radiation, and suggests the planet's atmospheric history may be more complex than previously thought.