I spent most of my childhood with books about dinosaurs that played up the ancient beasties as overgrown lizards. The connection between dinosaurs and birds, while kind of flipping obvious once somebody points it out, was not much discussed among laypeople until I was in my teens. (That would be the 1990s, FYI.)
But, among scientists, the idea of a dinosaur-bird relationship is nothing new. In fact, Thomas Henry Huxley was making that connection back in the 1860s. On the Dinosaur Tracking blog, Brian Switek tells the fascinating story of how Huxley started to realize that dinosaurs and birds were related—a discovery that's all the more impressive because he figured it out without the help of some of the key transitional fossils we have access to today.
Read the rest
Huxley did not suggest that birds were the direct descendants of dinosaurs. So much geologic time was unaccounted for, and so few dinosaurs were known, that Huxley could not point to any known fossil creature as the forerunner of birds. Instead he made his argument on anatomical grounds and removed the issue of time. Dinosaurs were proxies for what the actual bird ancestor would have been like, and flightless birds (such as the ostrich and emu) stood in for what Huxley thought was the most archaic bird type. (We now know that Huxley got this backwards—the earliest birds could fly, and flightless birds represent a secondary loss of that ability.) As Huxley went about collecting evidence for his case, though, he also gave dinosaurs an overhaul.
Christie Aschwanden is a science journalist. Last month, she joined a lot of other science journalists at the National Association of Science Writers conference and gave a short Ignite presentation about why people get angry when presented with evidence that their beliefs are wrong. She's posted a storyboard of the presentation to The Last Word on Nothing blog. It's definitely worth a read.
Read the rest
I’m married to an amazing guy. Dave is like those honeybees that always know the way back to the hive. Me, I’ve gotten myself lost in the Hearst building. We’ll be hiking and we’ll come to a split in the trail and I’ll point one way and say, we need to go here. And Dave will say no, actually, this is the right way (as he points in the opposite direction). And I’ll insist that, no, this is the way.
And then he’ll point out that my way peters out below some cliff face. Which only pisses me off. The more evidence he shows me that I’m wrong, the more insistent I become — I’m right and he’s wrong. And it’s not just me. This political scientist named Brendan Nyhan at Dartmouth has documented what happens when you show people evidence that their beliefs are wrong.
So when Dave tells me that his way is right and mine is straight up a cliff, I think, oh yeah? Well I’m smart, independent and capable, so therefore I’m correct. I would never point us in the wrong direction. See, it’s never really about the hiking trail.