Tech leaders want the shares given directly to Americans, not parked in a foundation.

The Martian Moons eXploration spacecraft targets Phobos with a 10-gram sample return that could settle whether Mars' moons are captured asteroids or impact debris.

JAXA's MMX spacecraft lifts off Oct. 19 to settle whether Phobos and Deimos are impact debris or captured asteroids, with NASA instruments riding along.