# On apocalypse clocks.

The world is complicated. There’s so much information out there, so much to know. And our brains are not made well for knowing much of it.

I can understand numbers like a dozen, a hundred. I can make a guess at the meaning of a thousand. Show me a big gumball machine and ask me to guess how many gumballs are in it, maybe I’ll guess a thousand, a few thousand.

But numbers like a million? A billion? A trillion? These numbers are important, I know. These numbers might be the population of cities, or of planets, or of solar systems. These numbers might be the ages of species or planets. These numbers might be how many stars are in the sky, or how many stars in the sky might harbor life.

These numbers don’t mean much to me.

I don’t think the problem is just my brain. I’m fairly good with numbers, relative to the average human. It’s been years since I’ve sat in a math class, but I can still do basic integrals and derivatives in my head.

Yet I can’t understand those big numbers. They don’t feel like anything to me.

So we make graphs. Charts. We try to represent information in ways that our meager human brains can grasp.

A good chart can be a revelation. Something that seemed senseless before is now made clear.

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An apocalypse is a revelation. The word “apocalypse” means lifting the veil – apo, off; kalyptein, conceal. To whisk away the cover and experience a sudden insight.

An illustration that depicts information well allows numbers to be felt.

Often, though, we illustrate information and we do it poorly.

The scientific method is gorgeous. Through guesswork, repetition, and analysis, we can learn about our world.

But science is never neutral. We impart our values by the questions we choose to ask, by the ways we choose to interpret the world’s ever-oblique answers.

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Geological time is often depicted as a clock. A huge quantity of time, compressed down into a 24-hour day. Often, this is done with the ostensible goal of showing the relative unimportance of humans.

Our planet has been here for a day, and humans appear only during the final two minutes!

Unfortunately, this way of depicting time actually overemphasizes the present. Why, after all, should the present moment in time seem so special that it resides at midnight on our clock?

The present feels special to us because we’re living in it. From a geological perspective, it’s just another moment.

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In Timefulness, geologist Marcia Bjornerud writes:

Geologic textbooks invariably point out (almost gleefully) that if the 4.5-billion-year story of the Earth is scaled to a 24-hour day, all of human history would transpire in the last fraction of a second before midnight.

But this is a wrongheaded, and even irresponsible, way to understand our place in Time. For one thing, it suggests a degree of insignificance and disempowerment that not only is psychologically alienating but also allows us to ignore the magnitude of our effects on the planet in that quarter second.

And it denies our deep roots and permanent entanglement with Earth’s history; our specific clan may not have shown up until just before the clock struck 12:00, but our extended family of living organisms has been around since at least 6 a.m.

Finally, the analogy implies, apocalyptically, that there is no future – what happens after midnight?

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Timefulness is a lovely book, but Bjornerud does not present a corrected clock.

And so I lay in bed, thinking. How could these numbers be shown in a way that helped me to understand our moment in time?

I wanted to fix the clock.

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The first midnight is easy – the birth of our sun. A swirling cloud of gas condenses, heating as gravity tugs the molecules into more and more collisions. Nuclear fusion begins.

Gravity tugs molecules inward, nuclear explosions push them outward. When these are balanced, our sun exists. Twelve o’clock.

Two minutes later, our planet is born. Metal and water and dust become a big rock that keeps swirling, turning, as it orbits the sun. It’s warmed, weakly, by light from the sun – our star shone dimly then, but shines brighter and brighter every day.

Our sun earns low interest – 0.9% each hundred million years, hotter, brighter. But wait long enough, and a low interest is enough.

Someday, shortly before it runs out of fuel, our sun will be blinding.

By 12:18 a.m., there is life on Earth. We’ve found fossils that many billions of years old.

And at 7:26 p.m., there will be no more life. Our sun will have become so bright that its blinding light evaporates all the oceans. The water will boil so hot that it will be flung into space. The Earth will be a rocky desert, coated perhaps in thick clouds of noxious gas.

Currently, it’s 10:58 a.m.

The dinosaurs appeared 35 minutes ago. 9.5 minutes ago, all of them died (except the ancestors of our birds).

Humans appeared 1 minute ago.

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So, we have 3.5 billion years remaining – another 8.5 hours on our clock – before we have to migrate to the stars.

Humans certainly can’t persist forever. Empty space is stretching. Eventually, the whole universe will be dark and cold, which each speck of matter impossibly far from every other.

But our kind could endure for a good, long while. Scaled to the 24-hour day representing the lifespan of our sun, we still have another 300 years before the universe goes dark.

So many stories could fit into that span of time.

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It’s 10:58 a.m., and life on Earth has until 7:26 p.m.

Humans crept down from trees, harnessed fire, invented writing, and built rockets all within a single minute. Life moves fast.

Quite likely, life from Earth will reach the stars.

But it needn’t be us.

The dinosaurs were cool. They didn’t make it.

We naked apes are pretty cool, too. I love our cave drawings, art museums, psychedelic street art. Our libraries. But we’ve also made prodigious mounds of trash. We’re pouring plumes of exhaust into the sky as we ship giant flatscreen televisions from place to place.

We burn a lot of fuel for the servers that host our websites.

We humans aren’t the first organisms to risk our own demise by pumping exhaust into the atmosphere. The industrial revolution was fueled by ancient plants – our engines burn old sunlight. But many microbes are happy to eat old sunlight, too. These microbes also pump carbon dioxide into the air. They’ve warmed our planet many times before – each time the permafrost thawed, microbes went to town, eating ancient carbon that had been locked up in the ice.

Foolish microbes. They made the Earth too hot and cooked themselves.

Then again, the microbes may have more modest goals than us humans. We’ve found no fossils suggesting that the microbes tried to build spaceships.

For our endeavors, we’ve benefited from a few thousand years of extremely stable, mild climate.

We still have 8.5 hours left to build some spaceships, but a thirty second hot squall at 10:59 a.m. would doom the entire project.

So much time stretches out in front of us. We could have a great day. We, in continuation of the minute of humans who preceded us, and continued by the seconds or minutes or hours of humans who will be born next.

We shouldn’t let our myopic focus on present growth fuck up the entire day.

Honestly? My children are four and six. I’d be so disappointed if I took them for a hike and they guzzled all their water, devoured all their snacks, within the first minute after we left our house.