Michael Tennesen is a glass-half-full kind of guy. The author of the newly published The Next Species: The Future of Evolution in the Aftermath of Man tells Lindsay Abrams of Salon that something may extinct humans (his guess: overpopulation), but it’s not that big a deal. Maybe something less shitty will come along and replace us.
A tangent before the interview excerpt: I’ve heard a million times that no one reads anymore and that Amazon has destroyed publishing and that books are dead, but have you noticed how one great title after another keeps emrging, almost more than it’s possible to keep up with? Something there doesn’t compute.
The interview excerpt:
Question:
A lot of us look at these studies about pollution and climate change and extinction on a very day-by-day, headline basis. What was the value for you of stepping back and taking a more pulled-back, planetary perspective on these issues?
Michael Tennesen:
I was influenced by a paper that Anthony Barnosky from the University of California at Berkeley wrote, about his idea that we are entering a mass extinction event. People who study life on Earth think that extinction has a dual side: it could be a catastrophe or it could be an opportunity. The comet that fell out of the sky at the end of the Cretaceous period knocked out the dinosaurs, but made way for mammals and man.
So I’m trying to look at what can happen next. And to get an idea of what can happen next, I kind of had to pull back and look at the history of life on Earth with the idea: how does life recover from catastrophe? What things can you see in both events that might possibly be repeated in the future? I wanted to look at the whole concept. There was a book by Alan Weisman, The World Without Us, where he talked about what it would be like tomorrow if man disappeared and how long it would take for man’s infrastructure to come down, for New York to fall. I just wanted to look at it from more of a reality standpoint: What would the biology be like in such an event?
Question:
When you’re looking back at some of these lessons we can learn from past mass extinctions, what are some of the most important things you came across, that we should be paying attention to?
Michael Tennesen:
If you look at the past, the driver of four out of the five mass extinctions has been carbon dioxide. I went to Guadalupe National Park and took a hike with the national park biologist Jonena Hearst to Capitan Reef, which was just this explosion of life that existed back in the Permian Era, 250 million years ago, just before the Permian extinction. It showed just how susceptible life is to chemicals in the environment, and the litany of things that was going on during the Permian extinction, which was the greatest extinction we’ve ever had: 90 percent of life was knocked out of the ocean; 70 to 75 percent on land. The high CO2 content and greenhouse gases and other problems — sulfur dioxide release, major changes in the ocean currents — these are some of the things we’re dealing with now. I don’t know if we’re going to be heading into that massive of an event, but there are lessons there. A lot of people want to go, “Well, what’s CO2? What’s the big deal?” It’s 400 parts per million. That’s a lot.
Question:
As you said, there is sort of a more optimistic way of looking at mass extinction, because there are some positive potential outcomes…
Michael Tennesen:
In an extinction event, you’ve got a new playing board. I went up to Mt. St. Helens and looked at the land around that volcano. They’ve actually separated a portion of the volcanic area as a natural experiment to see how life would come back. Nature actually does a pretty fabulous job pretty quickly.•