Conscious thought seems to have little effect on the action or direction of our species…. We have made our mark on the world, but we have really done nothing that the trees and creeping plants, ice and erosion, cannot remove in a fairly short time.

John Steinbeck,  The Log from the Sea of Cortez

From a wonderful and beautiful book

Life is hard. Everyone believes the world is ending all the time. But so far, all of them have been wrong.... The truth is infinitely more complicated, that we are all beautiful even as we are all part of the problem, and that to be a part of the problem is to be human.

Anthony Doerr, Cloud Cuckoo Land

 

Ecology and evolution are deeply intertwined. Just as the death and decay of organisms provide raw materials for subsequent generations, so too the deaths of species spawn new possibilities for future generations of species. Without extinction, there would be insufficient ecological space for evolution to explore alternative solutions and diversify into new life forms. When initially faced with some change to their native environments, species don’t grimly stay put and evolve into new forms better suited to the transformed conditions. They move, tracking the old habitat. In general, it’s only when the old habitat disappears that species are forced to adapt or die. Mass extinctions—the dying off of multiple, distantly-related lineages over vast areas in a short span of time—occur when one or more external forces wipe out a range of habitats, cutting off opportunities for tracking habitats.  Over the past half-billion  years, there have been five major mass extinctions, with the dinosaurs wiped out in the most recent of these. We now face the sixth mass extinction, which threatens to tear apart the fabric of the biosphere, with drastic consequences for most life on this planet, including us. In better times, species losses tick along at a barely discernable rate—perhaps one every five years. At present, somewhere between 50 and 150 species disappear every day, never to be seen again.... This time around, a single species—Homo sapiens—has become the external force driving the decimation of millions of other species. Yes, we are the asteroid now colliding with the planet. 


Scott D. Sampson, Dismiss dinosaurs as failures...and pave a path to a bleak future

In essence, the planet runs on a cycle of water-splitting by photosynthesis to form oxygen and the production of water by respiration.

Paul G. Falkowski in Life's Engines:  How Microbes Made Earth Habitable

Our every moment is passed in a procession across dawns and day's-ends of the orbiting earth, across successive waves of winter and summer, threading the planets and the stars.

László Krasznahorkai, The Melancholy of Resistance