From Brad Elliott, Sydney, Australia
A lunar colony would be far preferable to one on Mars. Its foundation is within the ambit of modern technology, and it could be rapidly serviced from Earth. The moon has many valuable resources, including water, which could be used alongside excellent solar power generation, unaffected by dust storms as it would be on Mars. There is no need to go to Mars to create an extraterrestrial colony (Letters, 28 December).
