I’m always interested in podcasting, and I’ve created an episode of a tentative series on the Anchor app. It’s just this blog post read out. Convenient for those whom listening is a better way to digest content. Here’s the link:
Listen to my segment “Abandonment among the stars” on Anchor: https://anchor.fm/astro-biological/episodes/Ecosystems-in-an-Abandoned-Megastructure-e1e59n/Abandonment-among-the-stars-a3bp5i
What do they find?
Mechanisms keeping the cylinder habitable are still somewhat operational. By some miracle of engineering the cylinder still has gravity as well.
There is a third planet from the Sun which seems habitable. Other expeditions are already exploring that world, and it seems this cylinder was built by whatever sentient beings once lived there.
A couple of weeks I decided to do something different with all the video stuff I do. I did a livestream on facebook and periscope. The topic of my stream was the very question addressed above: what new ecosystems and organisms could arise in an abandoned, livable space station were the human occupants to disappear?
It actually really got me thinking. The whole thing began as a random question on Isaac Arthur’s Science and Futurism facebook group. To my surprise there were a lot of great comments and ideas in response to this question.
I’ve addressed this subject matter before. A blog post explored the nature of interactions between the natural world and those sad, abandoned places on the periphery of civilisation. It’s like discovering a completely new world when I stumble upon these “transitional” places. Imagine finding such a world like the cylinder orbiting Venus. Just how and in what direction would any life on board manage?
It’s a really interesting question, and ties into the nature of life and how it has spread across our own planet. Most life existing today hasn’t arisen spontaneously from the firmament. Nothing’s done that for around 4 billion years. No, life has migrated, hitched rides or been tossed about by catastrophe and happenstance. It has essentially gone where the wind blows, and taken root wherever it has landed. The theory of panspermia relies on this vagrancy to offer an explanation for how life might have appeared here in the first place. I personally think Panspermia is very plausible.
In some ways we’ve seen panspermia in action, from a certain point of view.
This is of course, a very tenuous observation I make, but the principle is the same, using the example of Ascension Island in the Atlantic Ocean. This tiny little mound of dirt popping up from the waves is a giant ecological lab, an ongoing experiment that began over 150 years ago. All manner of species: some introduced, some native, were thrown together, on a barren little rock. Within decades, the island was a lush green paradise, with new ecosystems and new equilibriums. Quite amazing really, and Ascension Island represents a window into the greening of a dead planet such as Mars.
So. To return to the premise of this post. Explorers find a derelict space colony, now overrun by non human life. We’ve seen this on Earth too. Life is especially good at exploiting new niches. When the dinosaurs perished, the mammals that had lived in their shadow for 180 million years suddenly had an entire planet all to themselves. This resulted in the Tertiary radiation, a speciation event rivalling the Cambrian Explosion in the profusion of new species of mammal that suddenly appeared to exploit all this open space. Disaster ecology is an area of study devoted to this knack life has of adapting to catastrophe and finding new balances. Places like Ascension Island are one example of this. Others, like Chernobyl, are another.
So what of my superstructure, adrift in orbit around Venus? It would take several posts to really give it some justice, and so that’s what I’m going to do. A few posts on the post human world in a self contained semi functional space colony.
I must admit I have not been active with this blog lately. I have been busier than usual with new work and things in personal life shifting and changing constantly. It’s never forgotten. This will be attended to, and posts are going to start going up on a more frequent basis. Stay tuned, keep reading and I’ll be writing soon.