Oxygen Sheath (Tomorrow News Network: A to Z)

Hello, friends!  Welcome back to the A to Z Challenge.  For this year’s challenge, I’m telling you more about the universe of Tomorrow News Network, my upcoming Sci-Fi adventure series.  In today’s post, O is for:


It should not surprise you to learn that oxygen is one of the strongest oxidizers in the known universe.  For some of us, that makes oxygen a source of biochemical energy and a necessity for life.  But for many other life forms, oxygen’s oxidizing power is too much to handle, making oxygen a deadly poison.

There’s not much middle ground here.  You either need oxygen to survive, or oxygen means instant death, depending on whether your species evolved in an oxygen rich or oxygen poor environment.

When human colonists first arrived on Litho, they set up generators for a static oxygen sheath: a force field bubble that keeps Litho’s natural atmosphere out and holds an artificial oxygen atmosphere in.  The oxygen sheath isn’t perfect.  Near the oxygen sheath’s perimeter, you can smell ammonia seeping through.  And of course, all the alkaline dust particles covering Litho’s surface still pose a bit of an air quality concern.  Colonists are encouraged to wear nose filters whenever outdoors.

But the biggest concern related to the oxygen sheath has to do with Litho’s native life forms: the scrubby, slimy cyanomolds.  Those cyanomolds evolved in an oxygen poor environment.  Oxygen should kill them.  And yet, for reasons that remain unclear, the cyanomolds are thriving under the oxygen sheath’s influence.

Litho Colony is now partially surrounded by a mold forest.  Giant, bulbous masses have swollen up, with coral-like fringes and lots of creeping vines and tendrils.  To some, it’s a disgusting sight; to others, the cyanomolds have their own alien beauty.  Like so many things about life, it’s a matter of perspective.  But if left unchecked, the cyanomolds would spread rapidly across the colony grounds.  Keeping that mold forest under control has become a real nuisance for the colonists.

Next time on Tomorrow News Network: A to Z, we’ve already met young Milo Marrero.  Now it’s time to meet Milo’s dad.

14 thoughts on “Oxygen Sheath (Tomorrow News Network: A to Z)

    1. If the cyanomolds were intelligent (which they’re not), I don’t think they’d see humans as invaders. They seem pretty excited about the oxygen sheath, at least. The problem is that they’re a little too excited about the oxygen sheath. They’re like weeds, and the colonists just have to work hard to keep them under control.


      1. That was the plan – we’ve been trying to get ‘The November Deadline’ finished off – but we’ve ended up doing a daily, letter themed shout-out 🙂

        Liked by 1 person

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