Popular Paleontology

Amber is a fossilized form of tree resin. Because organisms can become trapped within the resin and preserved in remarkable detail, amber has long served as an invaluable resource for paleontological research. Although the origin of amber dates back to the Carboniferous period about 320 million years ago, amber containing preserved organisms did not become common until the early Cretaceous, roughly 125 million years ago. Such biologically rich amber deposits persisted until a

The collection of fossils by humans has a very long history. Archaeological evidence shows that even at Paleolithic sites, fossils were sometimes deliberately gathered and concentrated in specific locations. However, trilobite fossils are extremely rare in archaeological contexts. Prior to this discovery, only a small number had been reported from sites in Western Europe, North America, South Africa, and Australia. A recent study describes a trilobite fossil recovered from a

Leeches are soft-bodied worms with slick, flexible bodies, well known for their blood-feeding habits. They commonly inhabit wetlands and damp forest floors. Long before humans began recording history, our ancestors had already encountered these persistent annelids. For hundreds of millions of years, leeches have appeared almost unchanged in both form and lifestyle. Their familiar appearance—a soft-bodied worm equipped with suckers and capable of parasitism—gives the impressio

All terrestrial vertebrates belong to the group known as tetrapods, and tetrapods ultimately evolved from fishes that left the oceans and began exploring life on land. Determining when this transition began relies largely on fossil evidence. Until recently, the oldest traces of vertebrate movement on land were known from only a handful of sites, mainly in Europe and Australia. For example, locomotion traces preserved in early Middle Devonian strata in the Holy Cross Mountains

The mammalian order Perissodactyla includes today's horses, tapirs, and rhinoceroses. Yet during the Paleogene, these animals were far more diverse and widespread across the Northern Hemisphere. The puzzle lies in their sudden appearance in the fossil record: around the time of the Paleocene–Eocene Thermal Maximum (PETM), about 56 million years ago, perissodactyls emerged almost simultaneously in North America, Europe, and Asia, and they already displayed considerable diversi

Dinosaurs represent one of the most successful evolutionary lineages in Earth's history. Even today, more than ten thousand living dinosaur species—birds—inhabit the planet and dominate the skies. Yet despite this remarkable success, the early radiation of dinosaurs remains one of the most puzzling events in vertebrate evolution. Exactly how dinosaurs rose from relatively minor components of Triassic ecosystems to the dominant animals of terrestrial environments has long rema

Among reptiles, snakes have long attracted attention because of their distinctive body plan and physiological traits. Their unusual form has also made them powerful symbols in many human cultures. Today, more than 4,000 living species of snakes have been identified. They belong to the suborder Serpentes within the order Squamata (the scaled reptiles) and account for roughly 35% of all squamate species. In addition to snakes, Squamata also includes several other major groups s

As the opening chapter of the Mesozoic Era, the Triassic has long remained one of the least familiar periods in deep time. Compared with the Jurassic and the Cretaceous, the Triassic rarely receives the same level of attention. For many people, the era is remembered simply as the time when dinosaurs first began to rise. What is less widely known is that dinosaurs were not the dominant terrestrial animals throughout most of the Triassic. In fact, the land was ruled by another

In the previous article, we introduced phytosaurs—those crocodile-like reptiles that belonged to the early archosaur lineage. Their relationship to crocodiles was somewhat comparable to that between rabbits and guinea pigs: not closely related, but at least still within the same broad evolutionary branch. The animals introduced today are far more puzzling. They resemble crocodiles in appearance, yet they are not closely related to crocodiles at all. Their evolutionary origin

Do you enjoy reading Journey to the West ? Besides paleontology, Rodrigo has always loved mythological stories, especially legends about the fantastic beasts described in different cultures. The prehistoric animal introduced today resembles one such creature: Diting , the mythical mount of the bodhisattva Kṣitigarbha in Journey to the West . According to the novel, Diting possesses the head of a tiger, the horn of a rhinoceros, the ears of a dog, the body of a dragon, the tai

When people think of crocodiles, a very specific image usually appears: a long snout, a powerful jaw full of teeth, short limbs, and a body covered with heavy scales and bony armor. With these features in mind, almost anyone could instantly recognize a crocodile. But what if I told you that modern crocodiles are not the only animals that possessed this distinctive body plan? There was once another group of reptiles that looked even more “crocodile-like” than crocodiles themse

“Though the divine tortoise may live long…”—but in this case, the animal in question was not a turtle. When people imagine the oceans of the Mesozoic Era, what usually comes to mind? Perhaps the Cretaceous seas ruled by formidable marine giants such as mosasaurs, or the Jurassic waters where playful ichthyosaurs and elegant plesiosaurs swam side by side. Yet if one were asked which period hosted the most unusual marine reptiles, the answer would almost certainly be the Triass

The film Ice Age  carries cherished memories for many audiences. Its warm moments, comedic scenes, and the parade of prehistoric animals make the story unforgettable. One memorable moment features two rhinoceros-like mammals attacking the protagonists over scarce Ice Age vegetation, only to be knocked down by Manny the mammoth ( Mammuthus ). Those apparent “rhinos” are the focus of today's story: Megacerops . Megacerops , also known as “Brontotherium”, is an extinct perissoda

Dale Russell was a Canadian–American paleontologist. In 1982, while serving as curator of vertebrate fossils at the National Museum of Natural Sciences in Canada, he noticed that certain dinosaurs—such as Stenonychosaurus —possessed a brain-to-body mass ratio significantly higher than that of most other dinosaurs. This observation led him to speculate that such dinosaurs might have had the evolutionary potential to develop higher intelligence. Russell proposed that if these a

The American biotechnology startup Colossal Biosciences  recently announced what it described as a breakthrough in reviving the dire wolf, an achievement that even appeared on the cover of TIME  magazine and attracted considerable public attention. The dire wolf ( Aenocyon dirus ) was a canid species that lived roughly between 120,000 and 10,000 years ago, from the Late Pleistocene to the Early Holocene. It stood about 100 centimeters tall and measured around 180 centimeters

Dinosaurs were a group of animals with remarkable ecological diversity. Some were carnivores, others fed on plants and leaves; some specialized in insects, while others consumed fruits and seeds. Given such diversity, it is hardly surprising that certain dinosaurs relied primarily on fish. Among these fish-eating dinosaurs, the most famous is probably Spinosaurus . Spinosaurus  possessed an enormous body size and became widely known after appearing in the Jurassic Park  film

The genus Psittacosaurus  was a dinosaur that lived in East Asia during the Early Cretaceous. As many as twelve valid species have been assigned to this genus, with several additional forms that may represent distinct species. More than four hundred specimens have been discovered, making Psittacosaurus  one of the most diverse genera among non-avian dinosaurs. Among these more than four hundred specimens, some are fragmentary while others are nearly complete. One specimen in

I originally planned to write this as a short entry for a paleontology mini-encyclopedia, but the text gradually became much longer than expected. It felt a bit excessive for a discussion forum, so I decided to expand it into a full article instead. As for what to call it—perhaps a “paleontology mega-encyclopedia”? (Just kidding.) Xenodens calminechari Reconstruction of Xenodens calminechari (由Andrey Atuchin繪製) When people think of mosasaurs, they often imagine gigantic marin

Incorrect reconstruction of Oculudentavis khaungraae （感謝Han Zhixin提供） Anyone who follows paleontological research has likely heard of the Oculudentavis  incident, one of the most notable controversies in the field during 2020. In March of that year, the prestigious journal Nature  published a study led by paleontologist Lida Xing of the China University of Geosciences. The paper described a remarkable fossil preserved in amber from Kachin State in northern Myanmar, dated to a

Reconstruction of Australopithecus afarensis  — Lucy（感謝Dave Einsel/Getty Images提供） The question of human origins has long fascinated both scientists and the general public. One of the most frequently mentioned early hominins is “Lucy”, a specimen belonging to Australopithecus afarensis . The earliest discovery of an Australopithecus  fossil, however, dates back exactly one hundred years. In 1924, workers at a limestone quarry in South Africa uncovered a fossil that would late