Fantastic! Has this been shared on HN before? > We would come back about 20 ns older compared to her [the wife who stayed behind]. ≥ Or, the other way to look

Fantastic! Has this been shared on HN before? > We would come back about 20 ns older compared to her [the wife who stayed behind]. ≥ Or, the other way to look at it (since this is relativity after all), is that she would become 20 ns younger than us upon our return. Note to husbands: this could be a useful gift idea for your wife.