0505最新英文科普 打字学习同步
The animal kingdom is a noisy place. There's bird song...[CLIP:
Bird whistle]...choruses of frogs...[CLIP: Frog chorus]...
and lots of lesser known sounds, like the ray gun-like sounds of
baby alligators hatching and calling for Mom. [CLIP: Baby alligator sound]
There's lots of videos of them doing this on YouTube if you're curious.
"When I was a kid growing up, I had a pet alligator. It vocalized a lot."
John Wiens, an evolutionary ecologist at the University of Arizona.
"So I had this baby alligator when I was a teenager. Sometimes I
could hear 'Urh urh urh urh.' And when they grow up, they make bellows
and slaps and all sorts of sounds."
Wiens and his collaborator Zhuo Chen wondered: Why did animals start
vocalizing in the first place? One hypothesis was that the ability
originated in nocturnal animals-cause, you know, sound works a lot
better than colors or horns or other visual cues when you can't see.
Wiens and Chen built an evolutionary tree of nearly 1,800 vertebrate
species and mapped onto it information on whether each lived by day
or night and whether they made sound.
"So one of the things we did then was to do a statistical correlation
between the evolution of acoustic communication and whether they were
active by day or by night. And we found a very strong relationship.
Those that are active at night tend to evolve acoustic communication."
Suggesting that the nocturnal notion was more than just a shot in the dark.
The findings are in the journal Nature Communications. [Zhuo Chen and
John J. Wiens, The origins of acoustic communication in vertebrates]
This ability to vocalize likely arose independently, multiple times,
hundreds of millions of years ago-in frogs, mammals, geckos, and birds
and crocodilians. And though vocalization might have originated with
nocturnal animals, some night dwellers seem to have lost the ability-like
pangolins-while others, which evolved to be active by day, retained
it-like, of course, you and me.
Bird whistle]...choruses of frogs...[CLIP: Frog chorus]...
and lots of lesser known sounds, like the ray gun-like sounds of
baby alligators hatching and calling for Mom. [CLIP: Baby alligator sound]
There's lots of videos of them doing this on YouTube if you're curious.
"When I was a kid growing up, I had a pet alligator. It vocalized a lot."
John Wiens, an evolutionary ecologist at the University of Arizona.
"So I had this baby alligator when I was a teenager. Sometimes I
could hear 'Urh urh urh urh.' And when they grow up, they make bellows
and slaps and all sorts of sounds."
Wiens and his collaborator Zhuo Chen wondered: Why did animals start
vocalizing in the first place? One hypothesis was that the ability
originated in nocturnal animals-cause, you know, sound works a lot
better than colors or horns or other visual cues when you can't see.
Wiens and Chen built an evolutionary tree of nearly 1,800 vertebrate
species and mapped onto it information on whether each lived by day
or night and whether they made sound.
"So one of the things we did then was to do a statistical correlation
between the evolution of acoustic communication and whether they were
active by day or by night. And we found a very strong relationship.
Those that are active at night tend to evolve acoustic communication."
Suggesting that the nocturnal notion was more than just a shot in the dark.
The findings are in the journal Nature Communications. [Zhuo Chen and
John J. Wiens, The origins of acoustic communication in vertebrates]
This ability to vocalize likely arose independently, multiple times,
hundreds of millions of years ago-in frogs, mammals, geckos, and birds
and crocodilians. And though vocalization might have originated with
nocturnal animals, some night dwellers seem to have lost the ability-like
pangolins-while others, which evolved to be active by day, retained
it-like, of course, you and me.
上一篇:淋雨一直走-张韶涵(拼音)
下一篇:爱是百味而不是甜蜜
声明:以上文章均为用户自行添加,仅供打字交流使用,不代表本站观点,本站不承担任何法律责任,特此声明!如果有侵犯到您的权利,请及时联系我们删除。
文章热度:★☆☆☆☆
文章难度:☆☆☆☆☆
文章质量:★☆☆☆☆
说明:系统根据文章的热度、难度、质量自动认证,已认证的文章将参与打字排名!
本文打字排名TOP20
登录后可见
用户更多文章推荐
- 这个简单的练习就能提升自控力2020-07-15
- 脱水还会让你又傻又暴躁?2020-07-12
- 充电器究竟一年能产多少热?2020-07-11
- Pharaohs Got Yummy Mummy Me...2020-07-05
- 寄生虫让我们拥有了“性”?2020-07-02
- 醉酒能提高存活率?2020-06-22
- 植物也有“裙带关系”?2020-06-21
- 肺也能“尝”到气味2020-06-20
- 换换盘子颜色也能让我们吃的更少2020-06-18
- 明星找对象,也会看学历2020-06-17
- 发朋友圈的快乐和挣钱一样2020-06-14
- 护士人手不够增加患者的死亡风险2020-06-06
- 坐着不动在速配约会里更具吸引力2020-06-05
- 0602最新英文科普 打字学习同步2020-06-02
- 0601最新英文科普 打字学习同步2020-06-01
- 0531最新英文科普 打字学习同步2020-05-31
- 0527最新英文科普 打字学习同步2020-05-27
- 0526最新英文科普 打字学习同步2020-05-26
- 0519最新英文科普 打字学习同步2020-05-19
- 0518最新英文科普 打字学习同步2020-05-18
- 0517最新英文科普 打字学习同步2020-05-17