Presumably because they lack sufficient merit.
But their two white, male colleagues don't have to re-prove their merit. One has never even been to space, but it's the two astronauts with hundreds of days in space that need to be reconsidered.
But their two white, male colleagues don't have to re-prove their merit. One has never even been to space, but it's the two astronauts with hundreds of days in space that need to be reconsidered.
Perhaps the dropped promise differs from ruling out the possibility: it's very plausible these qualified astronauts would through their own skills produce the same result as was promised.
That’s IF they are evolving, otherwise expect two white males.