The global surveyor cruised in his geolander. He looked sidelong at the dash and realized he was burning three gallons per light-year. That was poor mileage even in this region of space, he thought. It should have gotten one light-year and sped three times faster. The space-time dilation effect made him giddy, at the best of times, and it was impossible to think in such concrete terms anyhow. He made a mental note to pursue the matter further later.