Sana

“The hard part, evolutionarily, was getting from prokaryotic cells to eukaryotic ones, then getting from single-celled organisms to multicellular ones. Earth is around 4.5 billion years old, a timescale I simply cannot get my head around. Instead let’s imagine’s Earth’s history as a calendar year, with the formation of Earth being January 1 and today being December 31 at 11:59pm. The first life on Earth emerges around February 25. Photosynthetic organisms first appear in late March. Multicellular life doesn’t appear until August or September. The first dinosaurs like eoraptor show up about 230 million years ago, or December 13 in our calendar year. The meteor impact that heralds the end of the dinosaurs happens around December 26. Homo sapiens aren’t part of the story until December 31 at 11:48 pm.

Agriculture and large human communities and the building of monolithic structures all occur within the last minute of this calendar year. The Industrial Revolution, two world wars, the invention of basketball, recorded music, the electric dishwasher, and vehicles that travel faster than horses all happen in the last couple of seconds.

Put another way: It took Earth about three billion years to go from single-celled life to multicellular life. It took less than seventy million years to go from Tyrannosaurus rex to humans who can read and write and dig up fossils and approximate the timeline of life and worry about its ending. Unless we somehow manage to eliminate all multicellular life from the planet, Earth won’t have to start all over and it will be okay--- at least until the oceans evaporate and the planet gets consumed by the sun.

But we`ll be gone by then, as will our collective and collected memory. I think part of what scares me about the end of humanity is the end of those memories. I believe that if a tree falls in the woods and no one is there to hear it, it does make a sound. But if no one is around to play Billie Holiday records, those songs won’t make a sound anymore. We’ve caused a lot of suffering, but we’ve also caused much else.

I know the world will survive us – and in some ways it will be more alive. More birdsong. More creatures roaming around. More plants cracking through our pavement, rewilding the planet we terraformed. I imagine coyotes sleeping in the ruins of the homes we built. I imagine our plastic still washing up on beaches hundreds of years after the last of us is gone. I imagine moths, having no artificial lights toward which to fly, turning back to the moon.”
― John Green, The Anthropocene Reviewed: Essays on a Human-Centered Planet