Chapter 423 (2/2)

Originally, the sharp fox ears turned into round ears and even drooped. They began to approach the appearance of dogs, and their size and aggressiveness were declining.

The sharp mouth of the fox itself is used for predation, but in the city, it gradually becomes a short round mouth. It looks more lovely and more suitable for picking up garbage and human food. ”

Fang ye heard the inner shock: ”it's incredible. The speed of evolution is too fast.”

Wang Yan said: ”yes, once animals adapt to urban life, there will be a very rapid evolution.

There is also a study on the black line vole in the previous two years. Originally, the researchers thought that the vole may live in the city. There may be so many cats, lights and all kinds of cars coming and going. It may not survive very well, but it is a very nervous state.

However, the actual research found that in fact, voles are very comfortable and relaxed. Its stress hormone is significantly lower than that of voles in the field.

If you poke a field vole or give a slight electric shock, it will be very panic, eat and sleep, and the rhythm of life will be affected, but it doesn't matter if you poke a city vole. Poke it. What should I do.

Its immune system, endocrine, hormone regulation and response to external stimuli are all more resilient because of changes in urban life. ”

Fang ye heard a familiar feeling and said with some laughter, ”isn't this lying flat now? It's better to live with ease than to be tired. ”

Wang Yan also smiled: ”there are indeed many similarities. This is also a kind of adaptability shown by human beings. ”

Fang ye said seriously, ”like coyotes and red foxes, what you said is that they run in with the city and change themselves to adapt to the city. Are there any positive things that we humans take the initiative to change?”

Wang Yan showed a look of emotion: ”the emperor butterfly is an example that impressed me deeply.”

Fang Ye raised his eyebrows and said, ”Oh, Emperor butterfly!”

Emperor butterfly should be the most famous butterfly in the world!

With black wings and orange wings, it is not only beautiful in appearance, but also very spectacular when migrating, which can be said to be overwhelming. When I was a child, I saw the figure of emperor butterflies in documentaries.

Wang Yan said: ”Americans especially like monarch butterflies. They like raising monarch butterflies and watching them. However, in the past 20 years, the population of monarch butterflies has decreased by 80%, and the number has decreased sharply. Monarch butterflies are directly on the edge of being vulnerable or even endangered. According to this trend, they may become extinct in a few decades.”

Fang Ye sighed slightly.

”People have found that the reasons for the sharp decline in their number are not only the rising temperature, the destruction of habitat, the extensive use of pesticides and herbicides, but also the inaction of the U.S. government in Highway Coastal Management.

However, it is difficult to push the government and the transportation department to establish laws and regulations on pesticides and herbicides. ”