This week NASA announced evidence for life on Mars, for the sixth or seventh time. This time it was an incredibly cool rock, and would you believe the Mars Perseverance rover already has a sample, taken July last year, banked and ready for return to Earth? In addition to this, NASA has already been working on a Mars Sample Return mission for many years! Unfortunately, that mission has been “paused” for almost two years after costs grew from $7b to a projected $11b, and after $3b had already been...