您好!欢迎访问每日学习网! 字典 词典 诗词
首页 英语 双语散文:先有鸡还是先有蛋?

双语散文:先有鸡还是先有蛋?

时间:2024-07-19 23:28:20 来源:网络 作者:mrcsb 人气:
【导读】:Chicken or egg? Like a hall of mirrors at the carnival, each attempt at an answer just leads to another question. If the chicken came first, then didn't it...

Chicken or egg? Like a hall of mirrors at the carnival, each attempt at an answer just leads to another question. If the chicken came first, then didn't it hatch from an egg? And if the egg came first, wasn't it laid by a chicken? It's one of those questions that seem unanswerable.

Scientists agree on where chickens came from: In a sense, human beings invented them, just like they invented cows and pigs and other domesticated animals on Old MacDonald's Farm.

If chickens were interested in tracing their family trees, they would need to bone up on some DNA research done in Japan. Every chicken that ever lived can trace its ancestors, say researchers, to a particular subspecies of Red Jungle Fowl in Thailand.

The male Red Jungle Fowl looks a lot like a storybook rooster. But the Jungle Fowl isn't identical to a farm chicken. Unlike chickens, female Red Jungle Fowls have no combs. Another Jungle Fowl peculiarity: After mating season, males replace their bright red and orange ruff with a crop of dull, blackish feathers called "eclipse plumage."

Scientists think the first domestic chickens were bred from Red Jungle Fowls more than 8,000 years ago in the region now divided into Thailand and Vietnam. People bred chickens first for cockfighting contests, later for eggs and meat.

So the first official "chicken" pecked its way out of an egg laid by a bird that was not-quite-a-chicken. Depending on how you look at it, the egg--or the wild chicken--came first.

In creating the domestic chicken--and coming up with some 175 varieties--human beings also created a world where chickens rule the roost: There are more chickens than any other kind of domesticated bird on Earth.

And where did birds come from? Scientists think that a group of egg-laying feathered dinosaurs were probably the ancestors of today's birds. So if it weren't for dinosaurs, there wouldn't be any Jungle Fowl OR chickens.

We've solved the riddle of where chickens came from. But there's still the question of where eggs came from.

Scientists say eggs--handy miniature incubators of life, nutrients already packed inside--evolved more than 1 billion years ago, in the oceans of Earth. When land animals evolved about 250 million years ago, their eggs had a tough covering to retain moisture on dry land. Egg-layers like amphibians, reptiles, and insects flourished. The first "land eggs" pre-dated chickens by about 249,992,000 years.

So "the egg" may be one answer to the old riddle, but here's another, if a little longer: The chicken came after the bird, the bird came after the dinosaur, the dinosaur came after the egg. And the egg came long after the first single-celled bacteria, the prokaryotes, evolved in the oceans, some 3.5 billion years ago.

bone up on: 专心致志于

comb: 鸡冠

incubator: 孵卵器

文章标签:
    英语学习,英语阅读
相关推荐
  • 2024国民音乐教育大会 音乐教育迎来“ai时光”
    2024国民音乐教育大会 音乐教育迎来“ai时光”

    2024国民音乐教育大会昨天在华东师范大学开幕,大会以“音乐教育‘ai’时光”为主题,围绕音乐教育核心议题,整合各界资源,直面当今音乐教育全产业链面临的形势与问题,深入研究、交流音乐教育的理念、内容、方法与途径。...

  • 出国留学咨询什么?
    出国留学咨询什么?

    出国留学咨询包括:留学费用、留学签证、留学申请、语言能力、文化差异等多个方面的留学咨询问题,只有了解了出国留学流程以后,我们才能够清楚的如何申请留学。以下具体介绍下出国留学咨询什么?...

  • 北京关于调整自学考试相关课程考试安排及教材信息的通知
    北京关于调整自学考试相关课程考试安排及教材信息的通知

    根据教育部教育考试院《关于调整高等教育自学考试“设计概论”等4门课程2024年10月考试安排的通知》(教考函字〔2024〕43号)精神及相关主考学校意见,决定对相关课程考试安排及推荐教材做如下调整:...

  • 北京2024年高考招生录取政策
    北京2024年高考招生录取政策

    为做好我市2024年普通高等学校(以下简称高校)招生工作,根据《教育部关于做好2024年普通高校招生工作的通知》(教学〔2024〕2号)等有关文件精神,结合本市情况,作如下规定。...

版权声明:

1、本文系会员投稿或转载自网络,版权归原作者所有,旨在传递信息,不代表看本站的观点和立场;

2、本站仅提供信息展示,不承担相关法律责任;

3、若侵犯您的版权或隐私,请联系本站管理员删除。

高考 自考 留学 英语 字典 词典 成语 古诗 造句 作文 地图