On The Cosmic Calendar, A Date To Remember

Carl Sagan, describing his twelve-month capsule of the history of the cosmos, summarized its lesson this way: “The world is very old, and human beings are very young.”  But a neglected date on the calendar points to a different conclusion about organic life itself.

Sagan included “The Cosmic Calendar” in The Dragons of Eden in 1977. The first voyage to Mars had lifted off two years earlier. NASA, with Sagan’s help, began listening for and sending messages to other intelligent beings who might have been out there. Sagan, while asking readers to appreciate our amazing intelligence, at the same time believed that we were not the only creatures in the universe who were so endowed. The Cosmic Calendar helped him show that because it took eons to produce human civilization, the eons might have led to similar results elsewhere.

On the Calendar, one month represents about 1.1 billion years, one day equals 38 million years, and in one brief second, 438 years fly by. The Big Bang, 13.8 billion years ago, explodes on January 1. The Milky Way takes shape around March 11 (dates are from the Wikipedia version) and our Sun first shines on September 2, with planets soon after. The first living cells stir on September 21. October features photosynthesis, the gradual oxygenation of the atmosphere, and the persistence of simple bacteria and their cousins. In November, those single cells develop nuclei, complexity, and greater energy, leading to the first multi-celled organisms in early December. From then on, the variety of life emerges swiftly: fish and land plants in mid-month, dinosaurs at Christmas, then birds and flowers, and humans in the last hours of New Year’s Eve.




But this late appearance of humans may distract us from another date. September 21 marks the date for the beginning of organic life itself, only a few “short” weeks (about 700 million years) after the formation of the planets. From that date on—for more than a quarter of the duration of the universe—life has existed on Earth. While humans may be newcomers, living things are not. Our chain of ancestors are long-time participants, old-timers in the cosmos. We humans are fully part of the long cosmic process, not just because our atoms are star-stuff but because our cells have their “months” of cosmic history.

What is new in us, with our nearly-New-Year’s intelligence, is that we are aware of all this. But our living spark is nearly as old as planets.

Shall we celebrate September 21 each year as the “Birthday of Life”?

Darwin and the Buddha

The teachings of Charles Darwin and Gautama Buddha are worlds apart. Yet their descriptions of life bear similarities to each other and even interlock in ways that expand my view of each.  I’ll focus this comparison on  On the Origin of Species and the Dhammapada, a widely read collection of the Buddha’s sayings.

The differences are straightforward enough. Darwin’s eye was mainly on the past. In Origins, he observed the characteristics of successive generations of plants and animals—except for humans, whose evolution he discussed in other books—to show how natural selection and fertility served as the sources of the variation of species.

The Buddha, on the other hand, focused on humans, on the pain of our disappointments and the ease that disciplined renunciations could bring. And in contrast to Darwin’s focus on ancestry, the Buddha’s eye was on the future, on each person’s potential path forward out of suffering. Finally, while Darwinian evolution moved on inexorably, the Buddha convinced his followers that their future was in their own hands, that if they turned inward to grasp the nature of change and expectation, they could calm their cravings.

Yet beneath these distinct differences, both thinker followed a logic built from the same pieces.



First, for both Darwin and the Buddha, the struggles of ordinary life make up the starting point for the consequences and possibilities that followed. As different as their two works are, taken together they rest on the premise that for humans, animals, and plants alike, life is stressful, sometimes dangerous, and often unpredictable. Whether in a plant stunted by inadequate sunlight or a woman in conflict between family and her career, it is everyday obstacles and threats that drive the changes that the thinkers explored.

Such changes consisted of a series of steps, the other great commonality between their views. For Darwin, the steps were those small, random variations which, if they benefited an organism consistently, took their place among its inherited traits. Though each step was small, the end result could be a new, better-adapted species. For the Buddha, the steps consisted of a discipline in correct understanding, the extinguishing of selfish desires, and future rebirths. As they were in Darwinian evolution, the steps to enlightenment took time but led to relief from pain.

Combined, these variations on the themes of struggle, gradual change, and final resolution offer a rich vision: living things experience conditions that are not easily or perfectly satisfied, but the future offers steps from pain towards peace, though not necessarily within an individual’s lifetime. In place of a deity to oversee the the fate of living things, both men saw a reality in which ordinary life and an organism’s response to it were sufficient to drive changes sooner or later.

I and most people and animals tend to fix our gaze on those satisfactions and dangers that we see a relatively short distance ahead—the state of our income, our health, our children, our security, predictable weather, unpredictable disasters. I wonder what it was like to have the mindset of Darwin and Buddha, tuned to long spans of steady transition in which a being’s every moment is a step towards elsewhere.


My thanks to Elaine Smith for her assistance.