The fossil record acts as both a memorial to life’s spectacular possibilities and as a warning to humanity about how fast dominance can become forgotten history, according to our guest, Scottish paleobiologist Dr. Thomas Halliday. Halliday’s research investigates long-term patterns in the fossil record, particularly in mammals. In his magnificent and daring new book Otherlands: A Journey through Earth’s Extinct Worlds, Halliday translates cutting-edge science into vivid portraits of sixteen fossil sites and their inhabitants extending back 550 million years.
“To look at the skull of an extant freshwater crocodile is to read a character description. The buttressed processes and arches evoke Gothic architecture, here resisting not the weight of a cathedral roof but the powerful force of the jaw muscles. The high-set eyes and nostrils speak of low swimming, peering, and breathing just above the water surface; the long series of teeth, pointed but round, and set in a long, sweeping snout, suggest a feeding style of swiping, grabbing and holding prey, suitable for catching slippery fish. The scars of life are there, with fractures sustained knitted together. Lives leave their marks in detailed, reproducible ways.” – Thomas Halliday
In this podcast episode, we speak with Halliday about his travel guide to the history of multicellular life on Earth, the fragility of ecosystems, how entire extinct worlds are reconstructed from remnants in the Earth’s crust, and the importance of realizing that the lives and the worlds that we know were preceded by hundreds of millions of years of other life and other worlds, “simultaneously fabulous yet familiar.”
The rock record of the Earth is “an encyclopedia of the possible, of landscapes that have disappeared,” Halliday writes. “This book is an attempt to bring those landscapes to life once more, to break from the dusty, iron-bound image of extinct organisms or the sensationalized, snarling, theme-park Tyrannosaurus, and to experience the reality of nature as one might today.”
“We spent most of our evolutionary history surrounded by other beings, not having conquered the earth, and with a very limited material culture,” Stern says. “There are tremendous emotional costs to becoming the only act in town, costs that I think we feel in how we relate to one another and how we think about who we are. One way to look at these draconian, absurd experiments [on animals] going on all over the world is to see them as a symptom of that.”
In March of 2016, a group of scientists reported a discoveryfrom the forests of central Japan. Writing in Nature Communications, Dr. Toshitaka Suzuki and his team announced that compositional syntax, the property of speech that enables it to “express limitless meanings,” was not unique to human languages. It had been observed in the vocal system of a bird. The paper sparked a flurry of tweets. It was also picked up the popular press, and for good reason. Given the putative role of syntax in expressing higher order thought in humans, its presence in an avian vocal system suggested that when a bird sings it is not simply naming a stimulus in its immediate environment but, rather, expressing a thought.
“It’s amazing, the parts of yourself you can reach [writing fiction],” Stern says. “It’s an endless surprise, and that’s part of what makes it frightening.”
