Tag Archives: natural-history

The Last Days of the Dinosaurs by Riley Black

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The disaster goes by different names. Sometimes it’s called the end-Cretaceous mass extinction. For years, it was called the Cretaceous-Tertiary, or K-T, mass extinction that marked the end of the Age of Reptiles and the beginning of the third, Tertiary age of life on Earth. That title was later revised according to the rules of geological arcana to the Cretaceous-Paleogene mass extinction, shorted to K-Pg. But no matter what we call it, the scars in the stone tell the same story. Suddenly, inescapably, life was thrown into a horrible conflagration that reshaped the course of evolution. A chunk of space debris that likely measured more than seven miles across slammed into the planet and kicked off the worst-case scenario for the dinosaurs and all other life on Earth. This was the closest the world has ever come to having its Restart button pressed, a threat so intense that—if not for some fortunate happenstances—it might have returned Earth to a home for single-celled blobs and not much else.

The loss of the dinosaurs was just the tip of the ecological iceberg. Virtually no environment was left untouched by the extinction, an event so severe that the oceans themselves almost reverted to a soup of single-celled organisms.

This is a story about two things, Earth’s Big Bang and evolution. K-Pg (pronounced Kay Pee Gee – maybe think of it as KFC with much bigger bones, where everything is overcooked?) marks the boundary between before and after Earth’s own Big Bang, manifested today by a specific layer of stone in the geologic record.

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Riley with Jet – image from The Museum of the Earth

Ok, yes, I know that the catastrophic crash landing of the bolide, a seven-miles-across piece of galactic detritus, most likely an asteroid, that struck 66.043 million years ago, give or take, was not the biggest bad-parking-job in Earth’s history. An even bigger one hit billions of years ago. It was nearly the size of Mars, and that collision may have been what created our moon. Black makes note of this in the book. But in terms of impact, no single crash-and-boom has had a larger effect on life on planet Earth. Sure, about 3 billion years ago an object between 23 and 36 miles across dropped in on what is now South Africa. There have been others, rocks larger than K-Pg, generating even vaster craters. But what sets the Chicxulub (the Yucatan town near where the vast crater was made, pronounced Chick-sue-lube) event on the apex is its speed and approach, 45 thousand mph, entering at a 45-degree angle. (You wanna see the fastest asteroid ever to hit Earth? Ok. You wanna see it again?) It also helps that the material into which it immersed itself was particularly likely to respond by vaporizing over the entire planet. An excellent choice for maximum destruction of our mother. And of course, its impact on life, animal life having come into being about 800 million years ago, was unparalleled. In the short term, it succeeded in wiping out the large non-avian dinosaurs, your T-Rex sorts, Triceratops grazers, brontosaurian browsers, and a pretty large swath of the planetary flora as well, burning up much of the globe and inviting in a nuclear winter that added a whole other layer of devastation. Aqueous life was not spared. You seen any mososaurs lately? Even tiny organisms were expunged en masse. (Cleanup in aisle everywhere!)

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Image from Facts Just for Kids

Here’s what the Earth looked like just before, just after, and then at increments, a week, a month, a year, and on to a million years post event. It is a common approach in pop science books to personalize the information being presented. Often this takes the form of following a particular scientist for a chapter as she or he talks about or presents the matter under consideration. In The Last Days… Black lets one particular species, usually one individual of that species per chapter, lead the way through the story, telling how it came to be present, how it was impacted by the…um…impact, and what its descendants, if there would be any, might look like. She wants to show why the things that were obliterated came to their sad ends, but also how the things that survived managed to do so.

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Quetzcoatlus – image from Earth Archives

But as fun and enlightening as it is to track the geological and ecological carnage, like an insurance investigator, (T-Rex, sure, covered. But those ammonites? Sorry, Ms. Gaea, that one’s not specified in the contract. I am so sorry.) is only one part of what Riley Black is on about here. She wants to dispel some false ideas about how species take on what we see as environmental slots.

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Mesodma – image from Inverse

Some folks believe that there are set roles in nature, and that the extinction of one actor (probably died as a result of saying that verboten word while performing in The Scottish Play) leads inevitably to the role being filled by another creature (understudy?) As if the demise of T-Rex, for example, meant that some other seven-ton, toothy hunter would just step in. But there is no set cast of roles in nature, each just waiting for Mr, Ms, or Thing Right to step into the job. (Rehearsals are Monday through Saturday 10a to 6p. Don’t be late), pointing out that what survived was largely a matter of luck, of what each species had evolved into by the time of the big event. If the earth is on fire, for example, a small creature has a chance to find underground shelter, whereas a brontosaurus might be able to stick it’s head into the ground, but not much else, and buh-bye bronto when the mega-killer infrared pulse generated by you-know-what sped across the planet turning the Earth into the equivalent of a gigantic deep fryer and making all the exposed creatures and flora decidedly extra-crispy.

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Thescelosaurus – image from Wiki

Black keeps us focused on one particular location, Hell Creek, in Montana, with bits at the ends of every chapter commenting on things going on in other, far-away parts of the world, showing that this change was global. When the impact devastates the entire planet, it makes much less sense to think of the specific landing spot as ground zero. It makes more sense to see it as a planet-wide event, which would make the entire Earth, Planet Zero. It was not the first major planetary extinction, or even the second. But it was the most immediate, with vast numbers of species being exterminated within twenty-four hours.

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Thoracosaurus – image from artstation.com

I do not have any gripes other than wishing that I had had an illustrated copy to review. I do not know what images are in the book. I had to burrow deep underground to find the pix used here. I expect it is beyond the purview of this book, but I could see a companion volume co-written by, maybe, Ed Yong, on how the microbiomes of a select group of creatures evolved over the eons. For, even as the visible bodies of critters across the planet changed over time, so did their micro-biome. What was The Inside Story (please feel free to use that title) on how the vast array of bugs that make us all up changed over the millions of years, as species adapted to a changing macrobiome.

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Purgatorius – image from science News

I love that Riley adds bits from her own life into the discussion, telling about her childhood obsession with dinosaurs, and even telling about the extinctions of a sort in her own life. What glitters throughout the book, like bits of iridium newly uncovered at a dig, is Black’s enthusiasm. She still carries with her the glee and excitement of discovery she had as a kid when she learned about Dinosaurs for the first time. That effervescence makes this book a joy to read, as you learn more and more and more. Black is an ideal pop-science writer, both uber-qualified and experienced in her field, and possessed of a true gift for story-telling.

Also, the appendix is well worth reading for all the extra intel you will gain. Black explains, chapter by chapter, where the hard science ends and where the speculation picks up. Black incorporates into her work a wonderful sense of humor. This is always a huge plus!

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Eoconodon – image from The New York Times

Pull up a rock in the Hell Creek amphitheater. Binoculars might come in handy. An escape vehicle (maybe a TVA time door?) of some sort would be quite useful. Get comfortable and take in the greatest show on Earth (sorry Ringling Brothers) There literally has never been anything quite like it, before or since. The Last Days of the Dinosaurs a joy to read, is one of the best books of the year.

From the time life first originated on our planet over 3.6 billion years ago, it has never been extinguished. Think about that for a moment. Think through all those eons. The changing climates, from hothouse to snowball and back again. Continents swirled and bumped and ground into each other. The great die-offs from too much oxygen, too little oxygen, volcanoes billowing out unimaginable quantities of gas and ash, seas spilling over continents and then drying up, forests growing and dying according to ecological cycles that take millennia, meteorite and asteroid strikes, mountains rising only to be ground down and pushed up anew, oceans replacing floodplains replacing deserts replacing oceans, on and on, every day, for billions of years. And still life endures.

Review posted – May 13, 2022

Publication date – April 26, 2022

I received an ARE of The Last Days of the Dinosaurs from St. Martin’s Press in return for working my ancient, nearly extinct fingers to the bone to write a review that can survive. Thanks, folks.

This review has been cross-posted on Goodreads. Stop by and say Hi!

=======================================EXTRA STUFF

Links to the author’s personal, FB, Instagram, Tumblr, and Twitter pages

Profile from Museum of the Earth

Vertebrate Paleontologist & Science Writer
Riley Black is a vertebrate paleontologist and science writer. She is passionate about sharing science with the public and writes about her experiences as a transgender woman in paleontology.

Riley began her science writing career as a Rutgers University undergraduate. She founded her own blog, Laelaps, and later wrote for Scientific American, Smithsonian Magazine, National Geographic, and more. Riley has authored books for fossil enthusiasts of all ages, including Did You See That Dinosaur?, Skeleton Keys, My Beloved Brontosaurus, and Written in Stone.
Riley loves to spend time in the field, searching the Utah landscape for signs of prehistoric life. Her fossil discoveries are in the Carnegie Museum of Natural History, the Natural History Museum of Utah, and the Burpee Museum of Natural History. Riley’s work in the field fuels her writing. She believes doing fieldwork is the best way to learn about paleontology.

In your own words, what is your work about?

“What really holds my work together is the idea that science is a process. Science is not just a body of facts or natural laws. What we find today will be tested against what we uncover tomorrow, and sometimes being wrong is a wonderful thing. I love the fact that the slow and scaly dinosaurs I grew up with are now brightly-colored, feathered creatures that seem a world apart from what we used to think. I believe fossils and dinosaurs provide powerful ways to discuss these ideas, how there is a natural reality we wish to understand with our primate brains. The questions, and why we’re asking them, are more fascinating to me than static answers.”

Interviews
—–IFL Science – IFLScience Interview With Riley Black: The Last Days of the Dinosaurs – video – 15:40 – with Dr. Alfredo Carpineti – There is a particularly lovely bit at the back end of the interview in which Black talks about the inclusion in the book of a very personal element
—–Fossil Friday Chats – “Sifting the Fossil Record” w/ Riley Black” – nothing to do with this book, but totally fascinating

Items of Interest from the author
—–WIRED – articles by the author as Brian Switek
—–Scientific American – articles by the author as Brian Switek
—–Riley’s site – a list of Selected Articles
—–Science Friday – articles by the author
—–Excerpt

Items of Interest
—–Earth Archives – Quetzlcoatlus by Vasika Udurawane and Julio Lacerda
—–NASA – Sentry Program
—–Science Friday – Mortunaria – a filter-feeding plesiosaur
—–Biointeractive – The Day the Mesozoic Died: The Asteroid That Killed the Dinosaurs – on the science that produced our understanding of how the dinosaurs died out – video – 33:50
—–Wiki on the Hell Creek Formation

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The Treeline by Ben Rawlence

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Big changes are taking place across the vast plain stippled by spruce and striated with water that unfolds below the aircraft at 10,000 feet. The skin of the earth is melting, microbial life waking after thousands, possibly millions, of frozen years. The soil is transpiring—perspiring one could say since more moisture is being released than absorbed—and animals and plants are taking note. It is a new world, and intelligent life—the smart genes—is sniffing it out, sending out suckers, seeds and scouts, ranging north, getting ready.

The Treeline is a mind-blowing piece of work that will teach you many, many things you never suspected, while feeding your sense of awe and your sense of dread. We look to the margins for evidence of large changes in the world, tell-tale signs like rising levels along water frontages, expanding desert edges, changes in growing seasons, changes in wildlife. The treeline was the edge Ben Rawlence chose.

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Ben Rawlence – Image from 5 x 15

He had spent years writing human rights reports and trying to get the UN and governments to address refugee issues, but when he started writing through the eyes of the refugees themselves, in several books, many more people began to listen.

Understanding that the conflict and the displacement that was going on was driven by climate change I began to look for other examples, other parts of the world where we could see this process in action, where we could see climate breakdown as history already, and we could catch a glimpse of the future that awaits the rest of us. So I began digging around and doing research and came across this very arresting image of the trees and the forest moving north towards the pole. I discovered that the forest was on the move and the trees were turning the white arctic green. They shouldn’t be on the move. That’s not supposed to happen. And this sinister fact has huge consequences for all life on earth. – from the 5×15 piece

So, what exactly is the treeline? Generically, it is the latitude above which there are no trees, roughly the Arctic Circle. Another measure is the rippled line around the globe south of which the average July temperature is ten degrees centigrade or higher. (The Arctic Squiggle?) Discovering that the Arctic treeline consisted of mostly six types of trees, he set about to look at each of these.

Scots pine in Scotland, birch in Scandinavia, larch in Siberia, spruce in Alaska and, to a lesser extent, poplar in Canada and rowan in Greenland. I decided to visit each tree in its native territory, to see how the different species were faring in response to warming, and what their stories might mean for the other inhabitants of the forest, including us.

The Arctic treeline is actually fairly squishy, not so much a line as an area of transition, an ecotone, where tree presence diminishes rather than ceases. Rawlence begins with a look at where he lives, in Wales, at the yew, struggling to persist in a world that is no longer conducive to its needs. But that may be changing. Then, it is off to the Cairngorm Mountains in Scotland, the Scandinavian interior, Siberia (larch), Alaska, Canada, and Greenland, looking at the role the boreal plays in our environment, and at the impact of global warming on these borderlands.

More than the Amazon rainforest, the boreal is truly the lung of the world. Covering one fifth of the globe, and containing one third of all the trees on earth, the boreal is the second largest biome, or living system, after the ocean. Planetary systems—cycles of water and oxygen, atmospheric circulation, the albedo effect, ocean currents and polar winds—are shaped and directed by the position of the treeline and the functioning of the forest.

One of the things that most impressed me, among the many fascinating nuggets to be found here were descriptions of the structures underlying forests.

Wherever there are mushrooms, ferns, bracken and particular kinds of woodland plants like violets there was once forest. Rings of mushrooms are usually the outline, the long-ago earthwork of a tree stump. There are between fifteen and nineteen ecto-mycorrhizal fungi (fungi growing around the roots) in a mature pine forest, and they play a role in everything from carbon and nutrient transport to lichen cover, taking sugar from the tree and providing it with minerals in exchange. Planting trees without regard for the essential symbiotic “other half” of the forest below ground may be far less effective than allowing the ground to evolve into woodland at its own pace. Oliver Rackham describes a planted oak wood in Essex that even after 750 years still does not possess the orchids, plants and mushrooms that you would expect of a natural wood.

I was reminded of what it might look like to see a city like New York or London from above and believe it to be constructed entirely of the visible structures, not appreciating that there are vast underground networks, water lines, sewer lines, gas lines, electrical lines, communication cables, transit tubes, and the like that provide the lifeblood which allows the above-ground, visible city to survive. Globally, these threads of mycorrhizal fungi make up between a third and a half of the living mass of soils. Soil is in fact a huge, fragile tangle of tiny connected threads. Having done some digging in our back yard, I can very much appreciate that.

Another impressive feat is Rawlence’s strength in communicating how local populations interact with the trees among which they live. There are many surprises to be found here, in the range of specific benefits trees provide for one, which includes the fact that they transmit aerosols carrying chemicals that help maintain health in humans, that their leaves, berries, bark and other parts providing medicine for a wide range of illnesses, that they provide materials that oceans need to sustain life, that they drive planetary weather. Did you know that there are birch trees with things called trichomal hairs on the underside of their leaves, that capture particulates from the air, natural air filters that then allow the materials to be dropped to the ground, and washed away with the next rain? They also act like a fur coat for the leaves. The list goes on. You will be surprised by many of the uses that Arctic peoples have devised to make use of their local trees.

Will it be possible to continue such a positive relationship as the land becomes less supportive of human endeavors? The Sami people, for example, are finding it increasingly difficult to manage their reindeer herds. Snowmobiles are less than ideal when there is no snow. Substituting four-wheel All Terrain Vehicles may allow them to herd their critters, but using them damages the landscape even more. At what point will it be impossible to continue at all?

There are plenty of dark tidings. In this ring of melting ice global warming is taking place at a rate far in excess of what we experience in the more temperate zones. And then this unnerving bit; with more Co2 in the air, trees do not need to work so hard to get what they need, thus will produce less oxygen. Uh oh. As the forests of the northern hemisphere migrate north (race actually, at a rate of hundreds of feet a year in some places instead of inches per century) they are pursued on their southern end by increasingly fire-prone conditions. How much of our forest land will be consumed by a Langolier-like army of drought and flames before finding more welcoming climes? And then there is methane, pretty pearl-like bubbles when seen through clear Arctic ice, but how about this cheery nugget as permafrost becoming permaslush?

Some studies have suggested that an unstable seabed could release a methane “burp” of 500–5000 gigatonnes, equivalent to decades of greenhouse gas emissions, contributing to an abrupt jump in temperature that humans will be powerless to arrest.

In pop science books, the author acts as a guide to the subject matter, introducing us to the places he visits, and the experts he consults. Rawlence is an engaging and informative teacher with a gift for extracting local cultural lore and area-specific histories, as well as reporting the science in accessible terms. He seems like someone you would want to hang out with. You would certainly like to sign up for any class he teaches. You will learn a lot. He is also a lyrical writer, able to offer not only straight-ahead exposition, but poetical, sometimes emotion-filled reactions to the places he visits and the experiences he has on this journey.

The brilliant sun on the pinkish cliffs and the starched blue of the sky, which has been mostly hidden all week, make the morning sing. The scent of a meadow is so heady it should be bottled. The hay has been freshly cut: huge plastic-covered bales guide the eye to a combine harvester abandoned mid-job, its windows covered in sparkling dew. Beyond, the path crosses the meadow to a wide bend that the flooding river has worked into a series of interlinked channels. The little bridges have been overwhelmed and carefully placed stepping-stones lie visible in the clear stream, half a meter underwater. Feet have cut a higher path along the edge of the valley, around drowned shrubs, riparian willow now floating midstream. The roar of the main river is all around. Gray water cradling slabs of dirty ice meanders around a cliff and then widens into a foaming skirt over even-sized white granite boulders that snag the ice and make it dance and nod until it falls apart and joins the sea-ward torrent.

Rawlence a not a fan of western capitalism, and it would be difficult to argue that the short-term profit motive is not at variance with the long-term health of the planet, but places that were at least nominally socialist did a pretty good job of devastating their environments too. Maybe the problem is a human one first, and a economic-political one second. Maybe if we lived as long as some trees (not all are long-lived) we might have a more long-term view of what matters, and not keep rushing to use everything as fast as we possibly can before someone else does. Rawlence keeps his eyes on the scientific and anthropological issues at hand. How is warming impacting these trees, the landscapes in which they exist, the societies that have lived with them for centuries, and the wider world? What can we learn from the changes that have already taken place? What can we look forward to? What can we do about it?

Despite the growth of electric car usage and renewable power generation, we have arrived at this party too late, and relatively empty-handed. Attempts to mitigate global warming cannot change the fact that there is warming to come that is already baked in. We can do nothing to change that. It will continue, even were we to cease all carbon usage tomorrow. Not that we should abandon attempts to reduce emissions. But we should know that we will not see the benefits of those actions. The mitigation work we do today may impact future generations, but the planet will continue heating up for quite some time regardless. The most we can hope for in the short term is to slow the rate somewhat.

The Treeline is a must read for anyone interested in environmental issues, global warming in particular. Who doesn’t love trees? After reading this you will love them ever more. As Rawlence points out, we are at our core tree people, having evolved thumbs to get around in an arboreal world, and having lived among or near trees for all of human history. We have evolved together, and will continue to do so. But we will have to adapt to the new Anthropocene world rather than attempting to force it back into its prior form.

In the future, when the ice is gone, there may be no such thing as a treeline at all.

Review posted – February 18, 2022

Publication date – February 15, 2022

I received an ARE of The Treeline from St. Martin’s Press in return for a fair review, and a promise to plant a few saplings. Thanks, folks. And thanks to NetGalley for facilitating.

This review has been cross-posted on GoodReads

=======================================EXTRA STUFF

Links to the author’s Twitter page

Lizzie Harper, a Welsh illustrator, provided many images for the book. Sadly, there were none in the e-galley I read. But you can see some on her site. Here are links to Harper’s personal, FB, LinkedIn, PInterest, and Twitter pages

Interview
—InterMultiversal – An Interview with Ben Rawlence by Simon Morden

Items of Interest from the author
—–Video trailer for the book – 1:09
—–5 x 15 – Ben Rawlence on The Treeline – video
—–The Big Issue – ‘As the planet warms, the forest is on the move’ by Rawlence

Items of Interest
—–Patagonia Films – Treeline (Full Film) | The Secret Life of Trees – video 40:16
—–Cairngorms Connect – 200-year vision to enhance habitats, species and ecological processes across a vast area within the 600 square kilometer Cairngorms National Park.
—–NY Times – Feb. 4, 2022 – Seen From Space: Huge Methane Leaks by Henry Fountain

You Might Also Want To Check Out
—–Land by Simon Winchester
—–Being a Human by Charles Foster
—–The Earth’s Wild Music by Kathleen Dean Moore
—–Road of Bones – not in form, obviously. But this one offers a fictional horror-story take on the great north rebelling against the outrages of humanity

Music
—–George Winston – Forest
—–Sondheim – Into the Woods

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