> The amazing thing about these materials to me is that they are found in apace rocks that land on earth. > That means they are extremely stable for long dista

> The amazing thing about these materials to me is that they are found in apace rocks that land on earth. > That means they are extremely stable for long distance interstellar travel. No, that means that they are either stable for long distance interstellar travel, or they are created in the high-temperature high-pressure environment that is created when the rock is aerocaptured by and impacted into the planet. I think it is no suprise that similar materials are found around nuclear detonation sites and extraterrestrial impact craters: the energy release is on a similar large scale and similarly instantanious.