There's another reason you might want to trade some of your couch time for more effortful pursuits, too: Doing so will make time appear to slow down, allowing you to relish your life more. As blog Science of Us recently reported, neuroscience shows that if you don't want your days to pass in a blur of indistinguishable memory mush, "the key is to seek out newness."

So what to make of this new “epoch” of geological time? Do we deserve it? Sure, humans move around an unbelievable amount of rock every year, profoundly reshaping the world in our own image. And, yes, we’re currently warping the chemistry of the atmosphere and oceans violently, and in ways that have analogues in only a few terrifying chapters buried deep in Earth’s history. Each year we spew more than 100 times as much CO2 into the air as volcanoes do, and we’re currently overseeing the biggest disruption to the planet’s nitrogen cycle in 2.5 billion years. But despite this incredible effort, all is vanity. Very little of our handiwork will survive the obliteration of the ages. If 100 million years can easily wear the Himalayas flat, what chance will San Francisco or New York have?

The idea of the Anthropocene is an interesting thought experiment. For those invested in the stratigraphic arcana of this infinitesimal moment in time, it serves as a useful catalog of our junk. But it can also serve to inflate humanity’s legacy on an ever-churning planet that will quickly destroy—or conceal forever—even our most awesome creations. What paltry smudge of artifacts we do leave behind, in those rare corners of the continents where sediment accumulates and is quickly buried—safe from erosion’s continuous defacing—will be extremely unlikely to be exposed at the surface, at any given time, at any given place, tens of millions or hundreds of millions of years in the geological future.