When the Mars and the Earth are at the opposite sides of the Sun, the distance is the largest: approximately: 378 million km. The time needed for an electromagnetic wave to cover this distance is approximately: 21 minute.
The time of travel between Earth and Mars is between 4.3 minutes and 21 minutes, depending on the actual distance between the two planets.
Has it been made yet? I knew it was suppose to be in the making and was worried but could understand having to make it with American references for that audience because it really was so British. That can get dangerous though. The office was a fluke.
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