No one knows about that day or hour, not even the angels in heaven, nor the Son, but only the Father.
–Mark 13:32
There’s an article in what I believe is the current issue of Rolling Stone, about James Lovelock, the first and biggest proponent of the Gaia theory. For those of you who don’t know, Gaia (named for the Greek goddess of the Earth) is the concept that the world is essentially a self-regulating, self-propagating life generator. The old school of thought about
ecology and geologic history held that life on Earth arose simply because the conditions were right: correct distance from the sun, right elements of carbon dioxide in the atmosphere, water vapor and sunlight, etc. Gaia takes this a step further and says that not only did life arise when the conditions were right, but the biosphere itself makes those conditions more hospitable and keeps them from spinning out of control. Life, indeed, begets life.
It’s an elegant theory, and also a bit of a New Agey one, but that hasn’t stopped it from revolutionizing the way scientists think about ecology and planetary systems as a whole.
Lovelock is concerned. More than concerned. He’s predicting–if not the end of the world–the end of the world as we know it, and within a hundred years. The system is out of control, he says, and the equilibrium is hopelessly unbalanced. The rate of warming has been underestimated, according to him, and within a few decades we’ll see catastrophically rising temperatures as the globe spins off into a warming feedback loop. Refugees will be in the hundreds of millions. Food will become scarce. There will be famine, mass starvation, epidemics like we’ve never seen before as people flood north to escape increasingly hostile environments. In the end, Lovelock says, the world’s population will be whittled down from over six billion to perhaps a few hundred million, scattered about the northernmost points of the continents. Civilization may limp on, but in a vastly altered form. Gaia will eventually heal herself–but far too late to do us good.
This isn’t some far distant prophecy, if you believe him. This is an unimaginable change that will occur in my–and probably your–lifetime.
Well, I feel fine.
A few decades ago, overpopulation exploded as a huge worry. According to Professional Thinking Persons, the world’s population was growing far beyond the planet’s capacity to sustain, and by 2020 we’d all be living on top of each other, with wars over increasingly scarce resources being the order of the day.
Needless to say, this did not happen. Human beings may be short-sighted and self-interested to a horrible degree, but in some cases that’s what saves us. When self-interest takes over, boy do we move. The greatest scientific minds in the world came up with new growing methods, new forms of grain that could thrive in harsher environments and yield more in a harvest. Our technology now is such that we could feed far more people than we do if we had to. That doesn’t save a significant portion of the world today from constant hunger and frequent starvation, but their problem doesn’t lie in overall scarcity. Unfortunately, the issues go far deeper than that. The point is, however, that there’s no telling what we can do when our proverbial asses are against the proverbial wall.
Is global warming occurring too fast even for that? Is Gaia’s revenge inevitable? Well, if we’re all still here in a century, I guess we’ll know.
It’s worth pointing out, perhaps, that apocalypse is always imminent.
Check out Twenty Ways the World Could End, on Discovery Magazine online. Loaded with good stuff. Did you know, for instance, that all the laws of physics in the universe can change in an instant? That’s number three, the collapse of the vacuum. Apparently, very early in the life of the universe, a different form of vacuum existed, one where “empty” space was full of energy; this form was highly unstable and was quickly superseded by the current form, causing a vast release of energy followed by a calmer period. But is this the most stable form of the vacuum? The fact is that no one knows. If a still more stable form exists, it may explode without warning in a kind of chain reaction, drastically altering the fundamental nature of reality. There’s no way of knowing for sure what things would look like after that, but it’s relatively safe to say that it wouldn’t be healthy to go through.
How about the reversal of the magnetic field? Without it, all that stands between us and deadly cosmic radiation is a thin layer of atmosphere, one that would be quickly stripped away by powerful solar winds were the field to collapse (some scientists speculate that this is what happened to Mars). Studies suggest that it’s weakening, possibly in preparation for a polar flip, something that has occurred in geologic history but not in recorded history; no one has any idea what will happen when it does (though the fossil record suggests that living things have come through okay). Still, No One Knows, and that alone is threatening.
What about the Yellowstone caldera? The entirety of Yellowstone National Park is a supervolcano, one so utterly huge that you need to look at aerial maps to see it. Were it to blow, it would decimate the area for two hundred miles around, and ash
would bury the land from Vancouver to Denver. The dust thrown up would block out the sun’s light, throwing the globe into a volcanic winter. There would be no escape, nowhere to hide. It would be a disaster the likes of which we have not seen in recorded human history, though something like it occurred in Indonesia seventy-five thousand years ago, and is credited by some with knocking the human population down to about ten thousand people. Sulfuric acid formed in the atmosphere.
Currently, the caldera is filling with liquid magma. The floor of the caldera itself has risen at a record rate in the last few years. This type of supervolcano erupts about once every six hundred thousand years. Guess when the last eruption was.
And then there are all those comets that keep zooming out of the Oort Cloud.
And then there’s the hypernova*.
A hypernova is when a large star skips the supernova stage and collapses directly into a Black Hole. Unimaginably high levels of energy are released; these are some of the brightest events in the universe. Incredibly powerful beams of gamma radiation shoot out at the poles; these beams are very focussed and therefore a planetary body would have to be fantastically unlucky to get caught within one’s path. But unlucky is the operative word. ‘Screwed’ isn’t anywhere near enough to convey how bad this would be.
In our northern hemisphere, it would be as if a massive EMP occurred; all electronics would cease to function. Planes would fall out of the sky. The Aurora Borealis would be visible in broad daylight. Buildings with metal spires would act as
conductors, with electricity arcing off their tops. Rail lines would electrify.
In the southern hemisphere things would be much, much worse. Gamma radiation would bathe the surface of the earth. A stunning light show would be followed by mass deaths from radiation poisoning. Large mammals would go first, followed by larger reptiles, ocean life, creatures far under the surface of the sea. Microbes in the soil. Birds would fall dead from the sky. Things would burst into spontaneous flame. The magnetic field itself would be flayed away, leaving the Earth open to scorching solar winds. The Earth itself would cook, baked to death in the throes of a dying star.
Currently, in our neighborhood, there’s Eta Carinae, about eight thousand light years from us. It’s a hypergiant double-star. Guess what it’s an excellent candidate for?
The point of all this, for me, is not fear. I’m concerned, sure, but looking at all this, fear serves little to no point. We might be fine. We might be fucked. The thing, the mind-boggling, amazing, fantastic, wonderful thing, is that in a universe full of this level of uncertainty and entropy and lethal danger… we’re here. Still.
But I am conscious of the fact that every Autumn I’m lucky enough to see is one less left to me.
*A much better-written and fascinating description of the probable Terran effects of a hypernova can be found here. I cribbed most of what I wrote here from it. Shamelessly.