CURTIS C. CHEN:
It is very likely that I set Kangaroo Too on the moon because of The Fifth Element.
In that movie, there’s a throwaway line of dialogue when Korben Dallas’ mother telephones him and complains that he never visits her on the moon. I had totally forgotten this until I went to see a 20th anniversary screening this year (yes, we really are that old), but it must have been stewing in my subconscious all that time.
Because why wouldn’t you put a retirement community on the moon? Gravity there is only one-sixth of Earth’s, so elders with mobility issues will find it easier to get around. Every habitat needs to be pressurized and climate-controlled anyway, so it can be as tropical as residents want. The only downside is that your family will have even more excuses for not visiting. Q.E.D.
Using the moon as a setting also let me put characters in a wider variety of awkward situations. Most of the first novel took place in a single location—a cruise spaceship traveling from Earth to Mars—but each hemisphere of the moon is roughly as wide across as the entire continental United States. Add a futuristic high-speed subway connecting population centers, and a reckless secret agent can get into plenty of trouble all over the place.
One lunar feature I latched onto early in my research was a “crater of eternal darkness.” The moon is tidally locked to the Earth (i.e., one hemisphere always faces toward us), and there are places along the day/night terminator that either always or never see sunlight. If you want continuous free electricity to power a transportation network, put solar panels on mountaintops near the north pole; if you want to keep something hidden, bury it under the deepest crater at the south pole.
And, of course, I had to include visits to at least a couple of Apollo landing sites, which are preserved as historical museums in this future. I’m sure the same thing will happen in reality. As soon as people can affordably travel to other planets, there’s going to be a booming space tourism industry. Everybody wants to stand on the Lunar surface, see the Earth rise over the horizon, and cover that blue marble with their thumb.
But back to aging on the moon. NASA recently conducted a Twins Study in which they followed identical twin astronauts Scott and Mark Kelly for one year, while Scott lived aboard the International Space Station and Mark remained on Earth. The final report isn’t out yet, but researchers are already seeing unexpected results (e.g., telomere lengthening) which raise many interesting questions. It seems possible that humans could naturally live longer in low gravity environments.
Of course, the most important scientific question raised in Kangaroo Too is: could we actually keep chickens on the moon, and therefore have fresh eggs? The only way to know for sure is to establish a Lunar base and start breeding livestock up there. Make me a liar, Fish!