Zoology

This article focuses on the question of "why birds incubate eggs while turtles do not". By introducing the structural characteristics of bird eggs and turtle eggs, as well as the differences in the physiological characteristics of birds and turtles, it explains that birds, as warm-blooded animals, can provide suitable developmental temperatures for eggs through incubation spots, hence the need to incubate eggs. Turtles, as cold-blooded animals, cannot maintain constant body temperatures, so they only need to bury eggs in soil or sand to provide a stable external environment. At the same time, it points out that other reptiles do not incubate eggs either. Incubating eggs is a reproductive method unique to warm-blooded animals.

This article focuses on the question of "which came first, the chicken or the egg?" It elaborates on the corresponding answers based on different definitions of chickens and eggs, and combines the principle of species formation with the dialectical relationship between quantitative change and qualitative change to analyze the approach to solving this problem as a scientific and philosophical issue.

This article focuses on the theme of birds and introduces the nocturnal behavior of animals such as bats, field mice, owls, and marmosets. It explains that the formation of nocturnal behavior is a manifestation of the ecological niche differentiation of animals, which can be divided into two behaviors: avoiding predators and foraging for food.

This article focuses on the theme of "Why can't the Baiji dolphin be found anymore", introducing the past survival status of the Baiji dolphin, a unique species endemic to the Yangtze River in China, which is known as the "living fossil" and the "Yangtze River goddess". It lists the specific data showing that its population has sharply declined to near extinction over the past few decades, and analyzes the human-induced causes of the Baiji dolphin's endangerment, including overfishing, illegal fishing, disruptions to Yangtze River shipping, water pollution, dam construction, and reckless construction. It also mentions the results of relevant scientific investigations, academic viewpoints, media reports, and the related statements of aquatic animal expert Wang Ding.

This article focuses on the question of "why beavers build dams", introducing the species attributes, distribution range, protection level, and living habits of beavers. It explains why beavers build dams to avoid exposing their nests and maintain the water level at the entrance of their burrows, demonstrating their outstanding ability to actively transform and shape their environment.

This article focuses on the question of why hippos spend a long time submerged in water, introducing the physical characteristics and differences in living habits between ordinary hippos and pygmy hippos, as well as the aquatic adaptive structure of hippos. It explains that hippos spend a long time submerged in water to avoid the hot African weather and mosquito bites, and to enhance their own safety in the water environment.

This article focuses on explaining why bats hang upside down to rest. It points out that bats have short hind legs, cannot jump, and have difficulty taking off directly on flat ground. If they rest on the ground and encounter predators, they will not be able to escape quickly. Hanging upside down to rest has the advantages of having a wide field of vision, making it easy to take off quickly to avoid danger, and avoiding the sensitive skin and wings from being scratched by hard objects.

This article takes "Why can bats fly at night" as the theme, introducing the characteristics of bats' nocturnal activities, explaining that except for the fruit bat genus, large bats rely on visual positioning, while small bats and fruit bats mainly rely on echolocation. Moreover, bats have unique sound waves that do not interfere with each other, and bats can also sense the Earth's magnetic field to identify directions. In addition, the adaptive evolution of bats and moths serves as a model for contemporary radar and stealth aircraft.

This article focuses on the question of "why bats, as mammals, can fly". It introduces the basic information of bats, including their taxonomy, distribution, and diet. Combined with fossil clues, the structural characteristics of the wing membrane, the evolutionary path of gliding from their arboreal ancestors, the evolution of the mitochondrial energy system, and their survival strategy of avoiding bird competition by traveling at different times, this article answers the questions related to the evolution of bats' flight, making them the only mammals that have conquered the sky

The article "Why Can Pangolins Dig Through Mountains" revolves around the question of whether pangolins can "dig through mountains". It introduces the basic characteristics of pangolins, including their species distribution, appearance, and dietary habits. It explains the principle that pangolins possess strong digging abilities due to their sharp claws and multi-functional scales. It also describes the pangolin's cave-dwelling habits, its ability to climb trees and swim, its skill in trapping insects, its defensive methods, and its nocturnal habits. It points out that pangolins are forest guardians who protect the forest ecosystem.

This article focuses on the question of why anteaters can eat ants in caves, introducing the basic characteristics of the three existing species of anteaters, explaining why anteaters can catch ants in caves with their slender, sticky tongues, sensitive sense of smell, and well-developed front paws, and also mentioning other animals that mainly eat ants and the concept of convergent evolution in biology.

This article focuses on the question of "why mice are so hard to eradicate", and introduces the reasons why mice are difficult to eliminate due to their sensitive senses, reliance on caves for protection, cautious nature, and extremely high reproductive rates. At the same time, it provides methods for families to drive away mice by storing food properly, cleaning up, and destroying the living environment suitable for mice.