Life Found on Mars

ESA & MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA

No, life has not yet been found on Mars, but imagine waking up to that headline. How would you react? The headline’s font would be huge on print newspapers—maybe one word per page, occupying the first four pages. Some bold papers might even put one letter per page and go so far as to have blank pages for the spaces. The point is, it would be big news.

So I ask again, what would this stir for you?

For me, the swirl would be thick with competing thoughts and feelings, tripping over themselves to get out. First would be the raft of questions stemming from pure curiosity. Is it DNA-based? Is it a separate start, or do we share some ancient microbial ancestor—possibly shuttled from one body to the other following a meteoric impact? What lessons can we learn about how life forms? Can we get the discovered lifeforms to call us Mama or Dada? Will they make good pets?

One can imagine the discovery team, whether at NASA or elsewhere, ecstatic with joy. The entire exploration establishment around the planet would likely be giddy. SETI folks would probably be unable to chew for a while, wearing fixed grins.

I would share many of these same reactions, for the pure joy of discovery and the novel opportunity to re-examine what it means to be a part of life on Earth. But then it dawns on me just how devastating the news might actually be for the human race.

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In Breach of Contract

Image by Edar from Pixabay

Evolution is like a lengthy job application process. Each new species endures a long and harsh vetting procedure to judge what role it plays in the ecosystem, how prepared it is to deal with lean years, predators, disease, climate variations, and anything that might reasonably be expected to arise even once in a thousand generations. Those species not able to satisfy the impartial judges of nature are voted off the island. It’s a tough crowd.

The successful species—the ones that have held on for many thousands of generations—essentially have signed a contract with nature. The contract is implicitly a “common law” arrangement: if you’ve stayed with us this long, you’re (indifferently) accepted as part of the family.

The terms of the contract are also implicit: as long as you continue to operate within the parameters by which you were judged to be adequate members of the ecosystem, you enjoy the built-in protection of that same ecosystem to continue survival, having carved out a role integrated into the rest by a complex web of interdependencies.

Humans signed our contract with evolution based on a primitive lifestyle that persisted for hundreds of thousands of years. We also inherited clauses from ancestor species, whose capabilities we incrementally altered, thus extending the vetting span to millions of years.

Humans today stand in gross violation of our pact with nature. We are egregiously in breach of contract. Our protections are thereby revoked.

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Ultimate Success

What success might look like? Image by Emma Farley from Pixabay.

In early fall 2020, I took a break from intense work on textbook preparation to immerse myself in nature, in the form of a month on the Olympic Peninsula. I spent periods of good weather in the backcountry, and therefore didn’t bother carrying a tent along in my already-too-heavy backpack. Somehow sleep is more precious when there’s some chance of being woken by a (black) bear’s slobbery breath in your face. But for the many dozens of times I’ve slept this way in the wilderness, I have not had a single nighttime bear encounter—being exceedingly careful to keep food smells well away from my sleeping site. Luckily, it would seem that my physical person does not smell like food.

I’m not an adrenaline junkie with a death wish, but exposing myself to some risk at the hands of nature brings a greater appreciation of the relationship between humans and the world of the wild. Being a temporary tourist in nature is not quite the same as fully being a part of nature, but it’s closer than many experience in our human-dominated artificial world.

One of my aims for the trip was to step back from the nitty-gritty focus on margin-notes and glossary items for the textbook and synthesize a broader picture. Being immersed in the wilderness really helped that process. Nature is so grand; so ancient; so indifferent. Nature is wild. Nature is mature.

Humans have embarked on a 10,000 year experiment to separate from nature: to build stores and access “old money” that Earth has banked for eons, providing a recent freedom to largely ignore annual, renewable flows in nature. The last several centuries have accelerated the divorce to an alarming degree. But the question I stumbled upon as my boots navigated rocks and roots on the trail was:

Is the 10,000-year-old human civilization in its infancy, or nearer its end than its beginning?

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Earth’s Real Treasure

Image by Gordon Johnson from Pixabay

A 2018 paper by  Bar-On, Phillips, and Milo in PNAS contains a fascinating figure (Figure 1) that bears staring at for some time. It shows the dry carbon biomass distribution of various forms of life on Earth. Plants account for 450 Gt (giga-ton; 1012 kg) of mass, while the sum of all animals adds to 2.5 Gt. Humans comprise only 2.4% of animal mass on the planet, but that’s almost ten times as large as wild mammal mass. Add human livestock (outweighing human mass) and wild mammals are only 4% of the human-livestock-mammal trio.

But this post is heading somewhere else: lament about the un-wilding of the planet on your own time (kidding aside, please do!). Let’s start by considering the following question. Which do you think is more valuable: the web of living animals on this planet, or all the gold accessible in the ground? If given a choice to eliminate one and preserve the other, which would you choose? Gold, among Earth’s mineral stocks, is used for this question because it has served as a physically-based monetary standard for many cultures throughout time.

What follows has absurd elements to it, but hopefully in forgivable service of a larger point about the value of life on this planet and in shining a glaring spotlight on current human values.

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