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<h2>Engineering</h2>
In its natural state Mars was perhaps the second most hospitable planet in the solar system— that is to say, not hospitable at all, with barely any air, and temperatures ranging from -87 to -5 ℃. The early colony thus had to create micro-habitats with air pressure and composition and heat more like Earth’s. These were normally built as domes, as this maximized the liveable volume. Curved surfaces were a challenge to architects, who therefore mostly built rectilinear buildings inside.
<p>The considerable equipment involved to make Areopolis comfortable for Earth primates was housed in this dome, as were the hydroponics greenhouses and industrial facilities.
<p>Beginning in 3200, Tajima energy screens were erected over the city, creating a breatheable but cold "outside". (The temperature now ranges from -40 to 20 ℃.) The open spaces of the city could now be used for many purposes— gardens, agriculture, industry, winter sports, storage— leaving the domes for residential and working areas.
<p>About a thousand years ago, a project began to magnetize Mars’s core, allowing it to retain a thicker atmosphere. Already the atmosphere is several times thicker, and the greenhouse process has begun to warm the surface, though it’s still far from liveable. Maybe in a thousand years they’ll be able to turn off the Tajima screens.
<p>Throughout all this, the Engineering dome has remained the domain of jumpsuited techs, bustling about devices representing 2500 years of technology. Supposedly the oldest running machine is an air monitor near the stadium exit, though claims are also made for a pinball machine in the staff lounge of Building E.
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