NASA Thinks There's a Way to Get to Mars in 3 Days

  We've achieved amazing things by using chemical rockets to place satellites in orbit, land people on the Moon, and place rovers on the surface of Mars. We've even used ion drives to reach destinations further afield in our Solar System. But reaching other stars, or reducing our travel time to Mars or other planets, will require another method of travel. One that can approach relativistic speeds. We can execute missions to Mars, but it takes several months for a vehicle to reach the Red Planet...