When I first came to Ajax, when I stepped out of the red-and-yellow shuttle to plant my feet in the planet's sand, what I noticed before anything else was how pale the buildings are. On Mars, even in the warmest and most equatorial provinces, human habitation is universally black (or its best approximation), built from fulcrete and basalt and painted wood, to absorb the warmth of the sun against the bitter cold. On Ajax, far closer to its sun than Mars or even Earth, and with its 39-hour days, they must build for the opposite, towers of white or reflective silver with burrowed basements and sub-basements and sub-sub-basements underneath. The Ajactes live in cities the color of bone.
The second thing I noticed, the thing that probably any other person would notice first, was the surfeit of salt in the air. I noticed this because it stung my eyes, like the threat of tears. As it happens, Ajax's oceans are significantly more saline than Earth's or Emieni's, and even its topsoil is a kind of hardpan composed of sand and dust cemented in a salt matrix. For the first several centuries of its habitiforming, it hosted an extremely carefully managed tight ecosystem of halophilic algae, bacteria and lichen painstakingly shipped from Earth and Mars, fed upon by a few species of brine shrimp. Gradually, the Hesperides introduced more species as the previous ones found their foothold: turtleweed and saltbush and cordgrasses, periwinkles and blue crabs and flamingos, suites of genetically-modified mangroves whose knees whistled in the morning and evening hours, bananas and maize and halotolerant rice. Most recently (within the last two hundred and fifty years) the Ajax Planetary Authority had grown increasingly bold and experimental: a breed of sheep brought out of cryogenic vaults on Old Earth to eat the masses of seaweed that washed ashore around the Southernmost Continent, whitetail deer both to manage the turtleweed scrubland that was covering the northern half of the Great Continent and to provide a stable meat source more robust than flamingos and periwinkles, a kind of gopher tortoise/diamondback terrapin hybrid that had proved encouragingly robust in the prairies of Mars, and even tigers to laze about in the shade of the forests that bordered saltmeadows full of bounding deer. All the Ajactes I spoke to seemed both personally invested in and extraordinarily proud of these tigers, showing me images and videos on their utility wedges, and several of the state television channels would cut away to live feeds of the animals sleeping or bathing their cubs or stalking prey.
