Mars, and Step on It

When it’s not the journey but the destination that counts.

To travel from star to star, ships could surf a wave in space-time itself. Since the 1990s, theories of interstellar flight have focused as much on gravity, electromagnetism, and the properties of space-time as on propulsion systems. (Paul DiMare)
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Michael Klesius is an associate editor at Air & Space/Smithsonian and a fan of high-speed space travel ideas.

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