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Before answering this question, it is necessary to explain the meaning of these two terms. The bear referred to here is what people commonly call "dog bear", such as a black bear; the cat referred to here is not the kind of cat seen in daily life, such as a domestic cat, but a red panda in th
In 1942, the lower right gum of a carnivore with a third premolar to a second molar was discovered in the swamp facies strata of the Hatvan site in the Panno Basin, Hungary. M. Kretzoi analyzed and studied this fossil specimen and believed that the central cusp of its lower premolars was thin
一、澜沧江.西双版纳澜沧江，在西双版纳傣族人民的心目中是“百万大象之河”。当地人们视象吉祥，日常生活中随处可见以象为主题的艺术形式：如佛寺壁画上讲述了世尊佛祖的前生——维先达腊王子将宝象送给灾害严重的勐（傣语，村寨的意思）的故事；亚洲象保护的文化因素：西双版纳傣族的手工织锦编制了各种象
1. Primitive proboscis without trunk For a long time before the emergence of Apatosaurus, people generally believed that the most primitive ancestor of elephants was the Elephantus. It appeared in Africa during the Eocene epoch 50 million years ago, without tusks and trun
On September 25, the British "Nature" magazine website published a paleoecological restoration picture on the homepage headline, and reported a report on ancient vertebrae from the Chinese Academy of Sciences under the title "Ancient fish show new face - jaw-dropping scientific discoveries" T
The bony fishes are the most prosperous group among living vertebrates and are divided into ray-finned fishes and lobe-finned fishes. According to the classification ideas of modern cladistics, the subclass Sarcopterygii includes not only lungfishes and coelacanths that still live in the wate
The Zhanghetherium fossil, which dates back about 120 million years ago, is the world's first entheodont fossil with a relatively complete skeleton and the first mammal fossil discovered in the Jehol Biota. The morphological characteristics of its cranium base and mandible indicate that the d
Megaraptor Erlian, which dates back about 80 million years ago, belongs to the oviraptorosaurs, a close relative of birds. It represents a transitional type of oviraptorosaurs and is also the largest maniraptorosaur discovered in the world (a group including oviraptorosaurs). A group of bird-
The primitive Jeholornis, which dates back to about 120 million years ago, is the most primitive bird discovered so far in my country. Its primitiveness is second only to the Archaeopteryx discovered in Germany, and it represents the oldest known specialized bird. Seed-eating birds. Its disco
Confuciusornis, which dates back about 125 million years ago, is one of the earliest birds known to have a horny beak in the world. It also retains a complete double-arch skull structure unique to its reptilian ancestors. This primitive Its characteristics and retained three finger claws are
The 3.7 million-year-old woolly rhinoceros discovered in the high-altitude Zanda Basin in the Ali region of Tibet, my country, is the most primitive woolly rhinoceros discovered so far. The discovery and study of the fossils of the woolly rhinoceros and other cold-adapted animals that coexist
The world's first pterosaur egg and embryo fossil was discovered in the Early Cretaceous Jehol Biota in western Liaoning, my country, about 121 million years ago. It is also one of the three pterosaur eggs that have been discovered in the world. Since the discovery of pterosaur fossils 220 ye
In the history of the United Nations, a total of three conferences on the law of the sea have been held so far. The first time was held in Geneva from February 24 to April 27, 1958; the second time was held in Geneva from March 17 to April 26, 1960; and the third time was from December 3, 197
The sea otter, also called the sea tiger, is a small marine mammal that lives in the North Pacific and feeds on shells, crabs and sea urchins. Sea otter fur can become an important commodity because sea otters are valuable fur animals. Their fur is dark brown, shiny, dens
Sea lions roar like a lion, and some species have a mane on their neck, which looks like a lion, hence their name. Its four legs are like fins and are very suitable for swimming in the water. The sea lion's hind legs can bend forward, allowing it to walk flexibly on land and squat on the grou
Among mammals, good divers should be those that live in the ocean, also known as sea animals. The ancestors of the sea beasts living in the ocean today are terrestrial mammals. After hundreds of millions of years, they gradually entered the ocean. Since various sea beasts have been in the wat
The Steller's sea lion is also known as the sea donkey and Steller's sea lion. It is the largest species of sea lion. The face is short and wide, the snout is blunt, the eyes and outer ear shells are relatively small, and the tentacles are very long. The forelimbs are longer and wider than th
Marine animals that are warm-blooded, viviparous, and nurse their young with breast milk are called marine mammals. They can also be called wild beasts in the ocean. Whales are mammals in the ocean. There are many types of whales, ranging from large to small. The largest