#Dinosaurs Archives – Page 11 of 12

June 3, 2022June 10, 2022

How Do Scientists Know?

Those scientists dudes–and dudenas–are so smart! They can tell you how much oxygen a dinosaur was using. They can figure out where the bubonic plague came from, 700 years ago. They can use new computers to rescan old pictures to look for earth-nudging asteroids. Exploring the universe with tools, logic, and an understanding of the behavior of things, they can describe what happened in places they can’t see and have never gone. Knowledge spreads ever-so-slightly outward into the vastness of the unknown.

Drawing of Dr. Jasmina Wiemann’s test subjects from scitechdaily.com.

Strangely enough, it gives me a warm and fuzzy sense of comfort. As the kids say, Science gives you All the Feels. But let’s not get it tangled up with Belief.

Hot Blood Begets Hot Thoughts and Hot Deeds

Whether dinosaurs were hot-blooded or cold-blooded is a century-old argument. It was two whole classes in my semester of Paleontology 2A, back in the 1980s. Dr. Jasmina Wiemann at CalTech may have come across clues that explain why it’s been so hard to determine. The answer is a little of both.

Dinosaurs were reptiles. They lay eggs, and they don’t have fur/hair–I will spare you the much longer explanation involving clades. Modern reptiles are cold-blooded, ectothermic; they rely on external sources to raise body temperature enough to move around. They have slow metabolisms, so are very thrifty with their energy movements. Mammals and other creatures are endothermic or warm-blooded, with fast metabolisms. We can move around even when it’s not warm or sunny, even though we’d rather burrow under the covers. And some of us have such low metabolisms that even thinking about Cheetos causes bloating. But I digress.

September 15, 2021September 16, 2021

How Dinosaurs Matter to Our Survival

If you come at the king’s arms, you best not miss. Better yet, run sideways. Photo at UnitedSquid.com.

Dinosaurs do matter to our future. Of course, I am not suggesting that there will be a time machine where a bespectacled parasaurolophus jumps out and yells, “You must plant Okra, before it’s too late!” … although that would be cool. But thinking about dinosaurs could be helpful to us, as explained in a fascinating little book by Kenneth Lacovara called Why Dinosaurs Matter.

I highly recommend the book, or at least Lacovara’s TED talk on YouTube, but let me debrief you. Consider this a book report that might contribute to saving the planet. It’s the scientific variation of the saying:

Those who cannot remember the past are condemned to repeat it.
Santayana

Dinosaurs Are a Metaphor for Abundance, Not Failure

So what lessons can dinosaurs teach us? If you see an 8.5 mile wide asteroid heading for your neighborhood, bend over and firmly place your head between your knees… or something a little less primitive?

Lacovara’s strongest point is that dinosaurs were an incredibly successful branch on the tree of life. They had zillions of species, ranging from smaller than a chicken to bigger than a Boeing 737. Their reign covered nearly a third of the span of time that multi-celled life has been on earth–three times as along as us mammals. The biggest irony, in fact, is that the word “dinosaur” is used as a metaphor for being outmoded or incapable of change because the dinosaur kingdom’s capacity to diversify and adapt is still unparalleled. They didn’t really “go extinct” as much as being extinguished by an extra-terrestrial bolt of lightning. Besides, technically, they’re not extinct–but we’ll get to that.

June 25, 2021July 20, 2021

The Dino-calypse: Mexican, Ukrainian, or the Hindu God Destroyer?

The traumatized pachycephalosaurus! Photo from cdn.mos.

If you think I’m nuts about the Olympics, you should hear me talk about dinosaurs. All anyone needs to say is “antorbital fenestra,” and I swoon. Or “Chicxulub crater,” which is the impact site for the theoretical asteroid that hit 65 million years ago and wiped out most of life on earth, except for the tree shrews, from which all of us are descended. (We’ll have to save the tree shrews for another time.)

So you can imagine my excitement upon learning of the controversy between the Boltysh crater and the Chicxulub crater. Which came first? Apparently, there’s big money in being first because scientists from India are also claiming precedence.

Also, I learned the word “palynological,” which satisfies my Weird-Word-of-the-Month fetish. It means “the study of live and fossil spores, pollen grains, and similar plant structures,” from the Greek palunein, which means “to scatter” as in dust or “pollen.” Fern spores are very much in play here. And, for those of you with allergies, you now know that they are palynological.

Ok, so these dudes back in 2010 noticed this crater in the Ukraine called the Boltysh crater. The crater was “roughly” the same age as Chicxulub, and when we’re talking 65 million years, roughly can be mean +/- a million years, right? They were trying to be a bit more precise—in the 10,000 year range maybe—to see whether Boltysh came before or after Chicxulub.