WEBVTT 00:00:00.000 --> 00:00:01.740 I want you to imagine just for a moment that 00:00:01.740 --> 00:00:03.759 you are holding something very specific right 00:00:03.759 --> 00:00:06.519 in the palm of your hand. Okay. It's cold, it's 00:00:06.519 --> 00:00:12.240 dense, and it is almost unfathomably old. You're 00:00:12.240 --> 00:00:14.939 looking at a fossilized bone, but not, you know, 00:00:14.960 --> 00:00:18.649 a complete museum -ready skeleton. You are holding 00:00:18.649 --> 00:00:21.629 just a few broken fragments of a single upper 00:00:21.629 --> 00:00:24.210 arm bone. A humorous... Just a chunk of rock, 00:00:24.350 --> 00:00:26.570 really, to the untrained eye. Exactly. Honestly, 00:00:26.750 --> 00:00:28.649 it doesn't look like much at all. Just a jagged 00:00:28.649 --> 00:00:30.949 piece of petrified history resting in your palm. 00:00:32.170 --> 00:00:35.450 But from this single shattered fragment, a magnificent 00:00:35.450 --> 00:00:39.429 200 year long scientific soap opera unfolds. 00:00:39.429 --> 00:00:41.609 Oh, it really does. Yeah. It stands as one of 00:00:41.609 --> 00:00:43.890 the probably one of the longest running taxonomic 00:00:43.890 --> 00:00:46.250 dramas in the entire history of paleontology. 00:00:46.270 --> 00:00:48.729 Yeah. And the entire cascade of arguments, the 00:00:48.729 --> 00:00:51.710 publications, the bitter rivalries is all anchored 00:00:51.710 --> 00:00:54.530 to that one lonely fragmented arm bone. Which 00:00:54.530 --> 00:00:56.450 brings us perfectly to the mission of today's 00:00:56.450 --> 00:00:58.850 deep dive. We are tearing into a very dense, 00:00:58.990 --> 00:01:01.530 incredibly fascinating Wikipedia article about 00:01:01.530 --> 00:01:04.310 an extinct flying reptile, a creature known to 00:01:04.310 --> 00:01:07.219 science as Palaeornis cliftei. A very loaded 00:01:07.219 --> 00:01:09.780 name, as we'll get into. Very loaded. Now, to 00:01:09.780 --> 00:01:12.019 really grasp the weight of the source material, 00:01:12.239 --> 00:01:15.959 we have to travel back 135 million years. We're 00:01:15.959 --> 00:01:18.359 dropping right into the early Cretaceous period. 00:01:18.659 --> 00:01:21.079 Specifically an age known as the Valenginian. 00:01:21.180 --> 00:01:23.480 Right, the Valenginian. And the location for 00:01:23.480 --> 00:01:26.120 this is a geological site we now call the Upper 00:01:26.120 --> 00:01:28.859 Tenbridge Wells Sand Formation, located in England. 00:01:29.099 --> 00:01:31.319 The Valenginian is just a spectacular backdrop 00:01:31.319 --> 00:01:34.140 for this. The early Cretaceous was this period 00:01:34.140 --> 00:01:37.519 of immense ecological... transition. And the 00:01:37.519 --> 00:01:39.739 formations in that specific region of England, 00:01:39.859 --> 00:01:42.719 they give us these incredibly rare tantalizing 00:01:42.719 --> 00:01:45.219 windows into a completely vanished ecosystem. 00:01:45.719 --> 00:01:48.239 Yeah. But the catch, and there's always a catch 00:01:48.239 --> 00:01:50.920 with paleontology, is that the window is exceedingly 00:01:50.920 --> 00:01:53.599 narrow. The preservation there isn't always giving 00:01:53.599 --> 00:01:56.180 us complete, beautifully articulated animals. 00:01:56.280 --> 00:01:59.159 It gives us fragments. A few parts of a single 00:01:59.159 --> 00:02:02.379 humerus in this case. That is our sole artifact. 00:02:03.280 --> 00:02:04.959 Every bit of the history we are about to cover 00:02:04.959 --> 00:02:06.620 stems from scientists trying to make sense of 00:02:06.620 --> 00:02:09.330 this one broken arm. Okay. Let's unpack this, 00:02:09.449 --> 00:02:12.250 because to understand just how messy this discovery 00:02:12.250 --> 00:02:15.229 gets, we really have to start our timeline in 00:02:15.229 --> 00:02:17.930 the 1830s. The absolute infancy of formalized 00:02:17.930 --> 00:02:20.349 paleontology. Right. This was an era where the 00:02:20.349 --> 00:02:22.729 sheer enthusiasm among these wealthy gentlemen 00:02:22.729 --> 00:02:25.889 scientists often dramatically outpaced the actual 00:02:25.889 --> 00:02:29.090 anatomical evidence they had on hand. Enter Gideon 00:02:29.090 --> 00:02:32.969 Mantel. Ah, yes. In 1837, and then later expanding 00:02:32.969 --> 00:02:37.150 on it in 1844, Mantel examines this exact humorous 00:02:37.150 --> 00:02:39.719 fragment. Now, looking back today, we know this 00:02:39.719 --> 00:02:41.860 is actually one of the earliest pterosaur discoveries 00:02:41.860 --> 00:02:44.539 ever made in England. A massive milestone. But 00:02:44.539 --> 00:02:47.860 Mantell doesn't see a flying reptile. He looks 00:02:47.860 --> 00:02:50.539 at this fragmented bone, feels extremely confident 00:02:50.539 --> 00:02:52.740 in his assessment, and officially identifies 00:02:52.740 --> 00:02:56.620 it as a prehistoric bird. A bird. A bird, and 00:02:56.620 --> 00:02:59.539 he names it Palaeornis cliftei. You really have 00:02:59.539 --> 00:03:01.340 to consider his perspective at the time, though. 00:03:01.719 --> 00:03:04.620 Mantell was already famous for discovering Iguanodon. 00:03:04.960 --> 00:03:07.300 Yeah, he was a superstar. Right. So finding a 00:03:07.300 --> 00:03:08.919 Cretaceous bird would have been the ultimate 00:03:08.919 --> 00:03:11.840 paleontological prize for him. When you only 00:03:11.840 --> 00:03:14.539 have a piece of an upper arm, your brain naturally 00:03:14.539 --> 00:03:17.080 tries to fill in the missing architecture using 00:03:17.080 --> 00:03:19.280 whatever familiar framework you already possess. 00:03:19.580 --> 00:03:22.259 Which is human nature. Exactly. If you are desperately 00:03:22.259 --> 00:03:25.740 hunting for ancient birds, you are going to see 00:03:25.740 --> 00:03:28.439 a bird. But the rush to claim that prize led 00:03:28.439 --> 00:03:30.939 to a rather hilarious administrative disaster 00:03:30.939 --> 00:03:34.520 hiding in our source material. The name Palaearnus 00:03:34.520 --> 00:03:38.199 was already taken. It was preoccupied. Yes. Taxonomists 00:03:38.199 --> 00:03:40.520 refer to this as the name being preoccupied. 00:03:40.960 --> 00:03:44.580 Decades earlier, in 1825, a naturalist named 00:03:44.580 --> 00:03:47.780 Vigors had formally used Palaearnus to classify 00:03:47.780 --> 00:03:51.060 a genus of parakeet. A small, vibrant, living 00:03:51.060 --> 00:03:53.539 parakeet. Yeah. Which, for those keeping track 00:03:53.539 --> 00:03:56.180 of modern taxonomy at home, is a lineage now 00:03:56.180 --> 00:03:58.979 considered a phononym of the modern genus Cetacula. 00:03:59.370 --> 00:04:02.129 So Mantell hasn't just misidentified a Cretaceous 00:04:02.129 --> 00:04:04.830 flying reptile as a bird. He has accidentally 00:04:04.830 --> 00:04:08.270 named his groundbreaking fossil after an already 00:04:08.270 --> 00:04:10.629 registered group of little green parrots. It's 00:04:10.629 --> 00:04:14.050 fantastic. By 1848, Mantell realizes what he's 00:04:14.050 --> 00:04:17.250 done. He publishes this brief notice trying to 00:04:17.250 --> 00:04:19.850 sneakily patch the error by tweaking the spelling 00:04:19.850 --> 00:04:22.949 to Palaeornithus, adding an I and an S to the 00:04:22.949 --> 00:04:26.230 end. But the naming chaos had already been unleashed. 00:04:26.329 --> 00:04:29.300 It was too late. The rush to publish in Victorian 00:04:29.300 --> 00:04:32.680 science created these massive historical pileups. 00:04:32.800 --> 00:04:35.139 And it actually serves as a great parallel to 00:04:35.139 --> 00:04:37.120 how you might consume information today. Oh, 00:04:37.120 --> 00:04:39.240 absolutely. We see it constantly with breaking 00:04:39.240 --> 00:04:42.199 news or sudden viral trends. Initial reports 00:04:42.199 --> 00:04:44.579 are incredibly prone to error because they lack 00:04:44.579 --> 00:04:47.540 broader context. But the sheer pressure to be 00:04:47.540 --> 00:04:50.240 the first one to publish. overrides the patients 00:04:50.240 --> 00:04:52.819 required to truly analyze the data. That rush 00:04:52.819 --> 00:04:55.100 to be first is exactly what causes the great 00:04:55.100 --> 00:04:57.959 pterosaur pivot of the mid -1800s. The broader 00:04:57.959 --> 00:05:00.399 scientific community finally steps in to issue 00:05:00.399 --> 00:05:02.560 some heavy corrections to Mantell's work. And 00:05:02.560 --> 00:05:04.720 they were heavy corrections. Two very prominent 00:05:04.720 --> 00:05:08.399 scientists, Giebel in 1847 and the legendary 00:05:08.399 --> 00:05:12.060 Richard Owen in 1846 and 1859, they examine the 00:05:12.060 --> 00:05:15.129 bone. And they both conclude that Mantell was 00:05:15.129 --> 00:05:19.110 entirely off base. It is not a bird. It is definitively 00:05:19.110 --> 00:05:21.990 a pterosaur. What's fascinating here is the absolute 00:05:21.990 --> 00:05:25.209 Wild West environment of 19th century taxonomy. 00:05:25.470 --> 00:05:28.649 Because Owen and Giebel, they don't just correct 00:05:28.649 --> 00:05:31.230 Mantell's broad classification. No, that would 00:05:31.230 --> 00:05:33.110 be too simple. Way too simple. They completely 00:05:33.110 --> 00:05:35.610 ignore each other's work and begin slapping brand 00:05:35.610 --> 00:05:39.069 new competing names onto the exact same fragment. 00:05:39.329 --> 00:05:42.029 Right. Giebel publishes his paper and decides 00:05:42.029 --> 00:05:45.550 to call it Pterodactylus or Ametis. Meanwhile, 00:05:45.829 --> 00:05:48.990 Richard Owen, who is famously egotistical, looks 00:05:48.990 --> 00:05:51.949 at the identical bone and declares it Pterodactylus 00:05:51.949 --> 00:05:54.610 sylvestris. It is the absolute pinnacle of institutional 00:05:54.610 --> 00:05:57.189 ego. Yeah. Instead of collaborating or building 00:05:57.189 --> 00:05:59.529 a consensus based on shared anatomical traits, 00:05:59.750 --> 00:06:02.209 everyone simply created their own entirely separate 00:06:02.209 --> 00:06:04.649 label for the exact same object sitting on the 00:06:04.649 --> 00:06:06.509 table. Anybody who has ever tried to collaborate 00:06:06.509 --> 00:06:08.790 on a digital project with a disorganized team 00:06:08.790 --> 00:06:11.329 knows this exact pain. You start with one master 00:06:11.329 --> 00:06:13.670 file and suddenly everyone is saving a different 00:06:13.670 --> 00:06:16.569 version to the shared drive. You've got bonefinal 00:06:16.569 --> 00:06:21.790 .doc. bonefinalgboledit .doc boneabsolutelyfinalonv2 00:06:21.790 --> 00:06:25.290 .doc 19th century paleontology was effectively 00:06:25.290 --> 00:06:28.730 a massive uncoordinated shared drive. And much 00:06:28.730 --> 00:06:31.370 like a disorganized digital workspace, the legacy 00:06:31.370 --> 00:06:33.670 files just keep getting shuffled into new folders 00:06:33.670 --> 00:06:35.870 without anyone actually reading the contents. 00:06:36.189 --> 00:06:38.310 Which brings us to what we might call the puzzle 00:06:38.310 --> 00:06:41.170 box century. Yeah. A long stretch from the late 00:06:41.170 --> 00:06:44.589 1880s deep into the 1970s. We jump forward to 00:06:44.589 --> 00:06:49.189 Lidecker in 1888 and then Hooley in 1914. They 00:06:49.189 --> 00:06:51.709 sift through this whole mess of names. They examine 00:06:51.709 --> 00:06:53.889 the... humorous, and they decide to toss it into 00:06:53.889 --> 00:06:56.589 an entirely different genus. They reclassify 00:06:56.589 --> 00:06:58.930 it as Ornithoeris clifty. They moved the bone 00:06:58.930 --> 00:07:00.889 into a completely new filing cabinet. They did. 00:07:01.189 --> 00:07:03.449 But as anyone looking closely at the source material 00:07:03.449 --> 00:07:05.769 will notice, the methodology behind this move 00:07:05.769 --> 00:07:08.769 was... profoundly flawed. The bone from Tunbridge 00:07:08.769 --> 00:07:10.949 Wells is officially registered under the holotype 00:07:10.949 --> 00:07:18.189 designation NHMUK 2353 -2353A. Lidecker and Hooley 00:07:18.189 --> 00:07:20.990 confidently assigned this holotype to the Ornithocaris 00:07:20.990 --> 00:07:24.089 family. The glaring issue is that if you actually 00:07:24.089 --> 00:07:26.990 pull the holotype for the type species of Ornithocaris, 00:07:27.250 --> 00:07:29.610 our little arm bone doesn't even overlap with 00:07:29.610 --> 00:07:31.850 it anatomically. They are missing the corresponding 00:07:31.850 --> 00:07:34.730 skeletal elements required to even conduct a 00:07:34.730 --> 00:07:37.319 direct comparison. wild it's the equivalent of 00:07:37.319 --> 00:07:39.740 trying to complete a massive jigsaw puzzle by 00:07:39.740 --> 00:07:41.660 forcing in a piece from an entirely different 00:07:41.660 --> 00:07:44.199 puzzle box right you just press it down on the 00:07:44.199 --> 00:07:45.920 table with your thumb and argue that the shade 00:07:45.920 --> 00:07:47.860 of blue looks close enough so it must fit there 00:07:47.860 --> 00:07:50.800 you're trying to connect sky to ocean The scientific 00:07:50.800 --> 00:07:53.319 rigor you would expect was simply absent. They 00:07:53.319 --> 00:07:55.399 were categorizing fossils based on superficial 00:07:55.399 --> 00:07:58.819 geological associations rather than strict comparative 00:07:58.819 --> 00:08:01.939 anatomy. Eventually, the discipline of paleontology 00:08:01.939 --> 00:08:03.920 had to mature enough for someone to look at that 00:08:03.920 --> 00:08:06.379 forced puzzle piece and admit that it simply 00:08:06.379 --> 00:08:09.220 did not belong. And that moment of clarity finally 00:08:09.220 --> 00:08:13.480 arrives with Peter Wellenhofer in 1978. Wellenhofer 00:08:13.480 --> 00:08:16.699 takes a long, hard look at this beleaguered upper 00:08:16.699 --> 00:08:19.800 arm bone. He reviews the century of bickering, 00:08:20.000 --> 00:08:23.100 the forced placements, the complete lack of overlapping 00:08:23.100 --> 00:08:26.000 holotypes. And he stops the music. He does. His 00:08:26.000 --> 00:08:27.959 conclusion is essentially to throw his hands 00:08:27.959 --> 00:08:31.759 up. He officially classifies the bone as ornithocaridae 00:08:31.759 --> 00:08:35.759 inserticetus. Inserticetus, a Latin term translating 00:08:35.759 --> 00:08:38.419 to of uncertain placement. Right. To an outside 00:08:38.419 --> 00:08:41.100 observer. Declaring a specimen in certisades 00:08:41.100 --> 00:08:43.820 might look like a surrender. But in the realm 00:08:43.820 --> 00:08:46.299 of science, it is a profoundly necessary and 00:08:46.299 --> 00:08:49.059 powerful act of honesty. Absolutely. Science 00:08:49.059 --> 00:08:51.120 does not require having the correct answer immediately. 00:08:51.480 --> 00:08:53.620 It requires us to group what we know with strict 00:08:53.620 --> 00:08:56.539 confidence and isolate what we don't until a 00:08:56.539 --> 00:08:58.740 superior framework is developed. While Heifer 00:08:58.740 --> 00:09:01.000 was clearing the board, he acknowledged the lack 00:09:01.000 --> 00:09:03.470 of data. and stop the century -long charade of 00:09:03.470 --> 00:09:05.429 pretending they knew exactly where this animal 00:09:05.429 --> 00:09:07.610 belonged. Here's where it gets really interesting. 00:09:08.389 --> 00:09:10.809 Wellhoffer's honesty sets the perfect stage for 00:09:10.809 --> 00:09:14.429 the 21st century. We finally enter an era equipped 00:09:14.429 --> 00:09:17.389 with comprehensive digital databases, advanced 00:09:17.389 --> 00:09:20.029 comparative anatomy, and a global network of 00:09:20.029 --> 00:09:23.169 researchers. The great 21st century reshuffle 00:09:23.169 --> 00:09:25.710 kicks into high gear, and the pace of discovery 00:09:25.710 --> 00:09:29.580 accelerates wildly. We shift from gentlemen arguing 00:09:29.580 --> 00:09:32.299 over cabinets in London to an interconnected 00:09:32.299 --> 00:09:34.679 scientific community running massive datasets. 00:09:35.360 --> 00:09:39.559 In 2009, a team led by Mark Witten reexamines 00:09:39.559 --> 00:09:44.240 the NHM UK 2353 specimen. They look at the morphology 00:09:44.240 --> 00:09:46.460 and declare definitively that this is not an 00:09:46.460 --> 00:09:48.919 ornithocarid. They move it over to a group called 00:09:48.919 --> 00:09:51.220 lonchodectidae. Right. What's fascinating is 00:09:51.220 --> 00:09:53.899 they base this on actual anatomical similarities 00:09:53.899 --> 00:09:56.480 to Humory that Hooley had assigned to the genus 00:09:56.480 --> 00:09:59.740 lonchodex way back in 1914. So Hooley was actually 00:09:59.740 --> 00:10:01.659 circling the correct evolutionary neighborhood 00:10:01.659 --> 00:10:04.039 a century earlier. Yeah. Even if his specific 00:10:04.039 --> 00:10:06.659 placement in order for Caris was poorly justified. 00:10:06.820 --> 00:10:09.120 Exactly. But the refinement process doesn't stop 00:10:09.120 --> 00:10:11.860 with Witten's team. No, it keeps going. A few 00:10:11.860 --> 00:10:16.269 years later, across 2012 and 2014. Researcher 00:10:16.269 --> 00:10:19.169 Alexander Averinov conducts a massive reassessment 00:10:19.169 --> 00:10:22.929 of a taxon called ornithostoma. During this exhaustive 00:10:22.929 --> 00:10:25.889 review, he pulls our famous arm bone back into 00:10:25.889 --> 00:10:28.850 the spotlight and moves it again. Another move. 00:10:29.110 --> 00:10:31.850 This time, he places it within the broader cleiades 00:10:31.850 --> 00:10:34.889 darkoidea, though he leaves its specific genus 00:10:34.889 --> 00:10:38.210 indeterminate. The move to Azercordia is a massive 00:10:38.210 --> 00:10:41.309 shift in how we visualize this animal. The Azdarchoids 00:10:41.309 --> 00:10:43.490 represent some of the most specialized and, in 00:10:43.490 --> 00:10:46.070 some cases, the largest flying animals to ever 00:10:46.070 --> 00:10:49.269 exist on Earth. Giants. Truly giants. Our single 00:10:49.269 --> 00:10:51.669 broken fragment is slowly being pulled into a 00:10:51.669 --> 00:10:53.850 much more dramatic evolutionary lineage. Which 00:10:53.850 --> 00:10:56.230 brings us to the ultimate plot twist from our 00:10:56.230 --> 00:11:00.519 source material. We jump to the year 2025. Researchers 00:11:00.519 --> 00:11:03.639 Thomas and McDavid finally crack the code. They 00:11:03.639 --> 00:11:06.120 run a comprehensive phylogenetic analysis of 00:11:06.120 --> 00:11:08.659 the entire asdarkoide group. And through that 00:11:08.659 --> 00:11:11.519 rigorous data crunching, they recover our taxon. 00:11:11.519 --> 00:11:14.120 They finally found it. They did. They officially 00:11:14.120 --> 00:11:17.600 identify the true home of this 135 million year 00:11:17.600 --> 00:11:21.179 old arm bone. It is formally classified as a 00:11:21.179 --> 00:11:23.700 sister taxon to the family Tepejaridae. If we 00:11:23.700 --> 00:11:26.320 connect this to the bigger picture, the journey 00:11:26.320 --> 00:11:29.360 of this single artifact is breathtaking. Let's 00:11:29.360 --> 00:11:31.580 trace the path. Let's do it. It began in the 00:11:31.580 --> 00:11:34.899 1830s as a prehistoric bird. It was rebranded 00:11:34.899 --> 00:11:37.600 as a generic Pterodactylus. It was shoehorned 00:11:37.600 --> 00:11:40.679 into Ornithocharis. It sat in the purgatory of 00:11:40.679 --> 00:11:43.740 Incerti Sades. It was shifted to Lonchodectidae. 00:11:43.740 --> 00:11:46.399 It was absorbed into the mass of Asdarchoidea 00:11:46.399 --> 00:11:50.519 clade. And finally, in 2025, it lands elegantly 00:11:50.519 --> 00:11:53.960 as a sister taxon to Depojaridae. And for anyone 00:11:53.960 --> 00:11:55.720 listening who might not be immediately familiar 00:11:55.720 --> 00:11:58.340 with tapajarids, this is an incredible payoff. 00:11:58.559 --> 00:12:00.440 We aren't just talking about a generic flying 00:12:00.440 --> 00:12:03.919 reptile anymore. Tapajarids were bizarre. Utterly 00:12:03.919 --> 00:12:06.080 bizarre. Imagine a flying reptile with no teeth, 00:12:06.240 --> 00:12:08.840 a beak almost like a parrot, and an enormous, 00:12:08.960 --> 00:12:11.320 flamboyant, sail -like crest protruding from 00:12:11.320 --> 00:12:13.360 its skull. Yeah. Some of these crests were larger 00:12:13.360 --> 00:12:15.679 than the actual skull itself, likely used for 00:12:15.679 --> 00:12:18.759 display. That is the family tree this dull, fragmented 00:12:18.759 --> 00:12:21.960 arm bone belongs to. So what does this all mean? 00:12:22.509 --> 00:12:25.549 When we step back, we have the story of a highly 00:12:25.549 --> 00:12:29.110 specialized crested flying reptile that died 00:12:29.110 --> 00:12:31.909 in the early Cretaceous. It left behind almost 00:12:31.909 --> 00:12:35.269 nothing, just a shattered humerus and timbered 00:12:35.269 --> 00:12:39.110 well sand. Yet, that solitary fragment was enough 00:12:39.110 --> 00:12:41.870 to spark two centuries of rigorous scientific 00:12:41.870 --> 00:12:44.250 investigation. It really is incredible. It proves 00:12:44.250 --> 00:12:46.750 that no piece of the fossil record is too small 00:12:46.750 --> 00:12:48.889 to matter, and that our understanding of the 00:12:48.889 --> 00:12:52.029 ancient world is a living... breathing, constantly 00:12:52.029 --> 00:12:54.389 evolving discipline. This raises an important 00:12:54.389 --> 00:12:56.769 question for you to consider today. How do you 00:12:56.769 --> 00:12:58.870 treat the established facts in your own life 00:12:58.870 --> 00:13:01.269 or your own field of work? That's a great point. 00:13:01.450 --> 00:13:03.470 We all have a tendency to fiercely defend our 00:13:03.470 --> 00:13:05.610 first impressions or the earliest data we receive 00:13:05.610 --> 00:13:08.389 on a subject. But looking at this fossil, we 00:13:08.389 --> 00:13:11.070 see that a single verifiable fact in science 00:13:11.070 --> 00:13:15.230 can require 200 years of intense debate, misdirection, 00:13:15.350 --> 00:13:17.789 technological advancement, and constant peer 00:13:17.789 --> 00:13:20.860 correction to finally categorize properly. Mantell 00:13:20.860 --> 00:13:23.639 wasn't foolish for seeing a bird. He was operating 00:13:23.639 --> 00:13:26.080 at the absolute frontier of his era's knowledge. 00:13:26.539 --> 00:13:28.940 The lesson here is that true learning requires 00:13:28.940 --> 00:13:32.360 us to be flexible. It requires the patience to 00:13:32.360 --> 00:13:35.500 let our understanding be refined over time, rather 00:13:35.500 --> 00:13:37.960 than demanding immediate certainty. That is the 00:13:37.960 --> 00:13:41.149 perfect takeaway from this 200 -year saga. But 00:13:41.149 --> 00:13:43.029 before we wrap up, I want to leave you with one 00:13:43.029 --> 00:13:46.009 final provocative thought to mull over regarding 00:13:46.009 --> 00:13:48.629 how the scientific community actually governs 00:13:48.629 --> 00:13:51.779 itself. The naming rules. Yes. We just spent 00:13:51.779 --> 00:13:54.139 this entire deep dive detailing the relentless 00:13:54.139 --> 00:13:56.879 iterative process of correcting historical mistakes. 00:13:57.320 --> 00:14:00.899 We know definitively, thanks to 2025 phylogenetic 00:14:00.899 --> 00:14:03.799 analysis, exactly what this creature is. However, 00:14:04.059 --> 00:14:06.480 the world of zoology is governed by an incredibly 00:14:06.480 --> 00:14:08.759 strict set of rules under the International Commission 00:14:08.759 --> 00:14:12.059 on Zoological Nomenclature, the ICZN. They do 00:14:12.059 --> 00:14:14.230 not mess around. They do not. Their foundational 00:14:14.230 --> 00:14:17.529 rule is the principle of priority. This means 00:14:17.529 --> 00:14:20.769 the very first validly published name for a species 00:14:20.769 --> 00:14:22.950 essentially gets grandfathered in permanently, 00:14:23.210 --> 00:14:25.809 regardless of how inaccurate the initial description 00:14:25.809 --> 00:14:28.210 was. You might be familiar with this rule from 00:14:28.210 --> 00:14:30.929 the infamous brontosaurus and apatosaurus naming 00:14:30.929 --> 00:14:34.009 wars. Classic example. Well, the same rigid bureaucracy 00:14:34.009 --> 00:14:38.029 applies here because Gideon Mantel properly registered 00:14:38.029 --> 00:14:42.409 his flawed 1837 paper. The permanent, unchangeable 00:14:42.409 --> 00:14:45.649 scientific name for this undeniably proven crest 00:14:45.649 --> 00:14:49.129 -bearing flying reptile remains Palaeornis clifty. 00:14:49.350 --> 00:14:51.830 It's beautiful irony. The science evolved. The 00:14:51.830 --> 00:14:54.210 truth was discovered. But the bureaucracy demands 00:14:54.210 --> 00:14:56.570 that this magnificent tapajorid relative will 00:14:56.570 --> 00:14:59.049 forever wander the halls of taxonomy carrying 00:14:59.049 --> 00:15:01.730 a name that literally translates to ancient bird.