Elephants are currently the largest land animals on Earth, with their sturdy limbs and wide feet firmly supporting their huge bodies. However, there were some prehistoric elephants that were even larger in size. Do you know which elephants have become extinct? This article will take you to learn abo...
Paleontologists call the impressions and replicas of paleontological remains left in rock formations or surrounding rocks called cast fossils. They can be divided into five types based on their relationship with the surrounding rocks: impression fossils, impression fossils, and core fossils....
Tsaidamotherium is a medium-sized bovine animal of the order Muskoxen, which lived in the early late Miocene. The shape of the Qaidam beast's horn is very special and complex, and can be called a "horn organ": there is a large disc-shaped bone structure on the parietal bone, called the poster...
Cats are the most specialized category of carnivores. Their typical characteristics are: retractable claws, short blunt snout, well-developed canine teeth and cleft teeth, and tooth degeneration after the cleft teeth. According to the current fossil record, the earliest cat was...
How birds, the descendants of dinosaurs, escaped the mass extinction event 65 million years ago has always been a question that scientists are eager to answer. A large amount of volcanic ash caused by meteorites impacting the earth and frequent volcanic activities filled the atmosphere, causi...
The authoritative American scientific journal "Science" published on December 8, 2000 will publish a scientific research paper by Zhang Fucheng and Zhou Zhonghe, young scientists from the Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, reporting on the...
Hemichordates are also called "cryptozoans" and they all live in the ocean. Their most striking feature is a nerve cord located on their back and a short blind tube called an "oral cord" extending forward from the back of their mouth. Some scientists believe that this dorsal nerve cord is the...
Life originated in the primitive ocean, and the earliest vertebrates were also born in the waters. Both armored fish and placoderm fish once flourished in Earth's waters, but they soon withdrew from the stage of history. There are many factors that contributed to their extinction, but the mai...