It’s the year 2030, and humans are finally undertaking interplanetary travel with a historic mission to the Red Planet. This is the premise for Discovery Channel Canada’s 4-hour “Race to Mars” mini-series, which the network describes as its most ambitious project to date. (Watch the trailer .) The show premiered in Canada September 23, but air dates for the U.S. are not yet available. However, the companion book to the series is. In Race to Mars ...