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美国国家公共电台 NPR A Slimy Discovery: New Fossil Found Of Jawless, Backless Hagfish

时间:2019-01-29 03:10来源:互联网 提供网友:nan   字体: [ ]
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SCOTT SIMON, HOST:

You might want to set aside your cornflakes for a moment now. Ed Yong writes in The Atlantic about a substance he says, quote, "looks revolting but is also one of nature's more wondrous1 substances, unlike anything else that's been concocted2 by either evolution or engineers." Ed Yong, science writer for The Atlantic, joins us now. What are you celebrating here?

ED YONG: Hi. I am celebrating the slime produced by a type of fish called the hagfish. So the hagfish is, you know, a 2-foot long creature that lives in the deep ocean. It looks a bit like an eel3, but it's not. It has no backbone4. It has no jaws5. And, most tellingly, it has the ability to produce incredible amounts of this very, very weird6 and unusual slime.

SIMON: I guess we could both make a lot of jokes about how similar it is to members of the U.S. Senate, but (laughter)...

YONG: Can neither confirm nor deny that.

SIMON: Slime. A teaspoon7 of slime at first, but it really multiplies, doesn't it?

YONG: So a hagfish will release about less than a teaspoonful8 of the slime from the glands9 on its side. But in, like, less than half a second, that teaspoonful will expand into liters of slime. If you put a hagfish in a bucket, at first, it'll look like these thin wisps of, like, white, cloudy stuff have been released from its flanks. And then, if you stick your hand in and swirl10 it around, you'll just be pulling out, like, handfuls of this stuff. It's almost like the entire bucket will have converted into slime.

SIMON: But this is what they do to protect themselves?

YONG: Right, it's a defensive11 measure. They release it when they're attacked or when they're stressed.

SIMON: Because a lot of predators12 might say, ha-ha-ha, no backbone, no teeth? I know what I'm having for lunch.

YONG: Right, exactly. They often get bitten and attacked. But when they do, they instantly release this massive cloud of slime which is very, very good at infiltrating13 nooks and crannies, including the mouths and gills of predators. So there have been these incredible videos of sharks biting hagfish and then just recoiling14, their mouths and gills full of slime and just gagging and being forced to retreat.

SIMON: Sharks essentially15 saying, I'm sorry (laughter). I'm not a Spielberg shark. They don't pay me enough to swallow slime.

YONG: I think it's more like they're saying, (vocalizing).

SIMON: (Laughter) Now, hagfish slime is in the news because of a new fossil, right?

YONG: So partly, yes.

SIMON: A newly discovered fossil.

YONG: A newly discovered fossil. The fossil is interesting because the evolutionary16 relationships of hagfish to other fish have long been controversial. Like, a lot of scientists have thought of them as very primitive17 creatures, like some sort of transition from a kind of worm-like thing to a fish-like thing. But this new fossil helps us understand that it looks like hagfish are vertebrates. They are part of the backbone lineage. They just seem to have lost a lot of the traits that we have, things like complex eyes and bones and taste buds. So rather than being this weird, evolutionary throwback, they're actually very, very well-adapted animals to the somewhat grim and grotesque18 life that they live at the bottom of the ocean, feeding on corpses19, sliming things that might want to eat them.

SIMON: Oh, boy, does that sound - ah, what a life that sounds like.

YONG: (Laughter) Right. But I tell you what, I was serious when I said that it's one of evolution's marvels20. I think very rarely do you see a substance with this combination of properties produced by an animal that most people have never heard of.

SIMON: Ed Yong covers science for The Atlantic. Thanks so much for being with us.

YONG: Thanks for having me.


点击收听单词发音收听单词发音  

1 wondrous pfIyt     
adj.令人惊奇的,奇妙的;adv.惊人地;异乎寻常地;令人惊叹地
参考例句:
  • The internal structure of the Department is wondrous to behold.看一下国务院的内部结构是很有意思的。
  • We were driven across this wondrous vast land of lakes and forests.我们乘车穿越这片有着湖泊及森林的广袤而神奇的土地。
2 concocted 35ea2e5fba55c150ec3250ef12828dd2     
v.将(尤指通常不相配合的)成分混合成某物( concoct的过去式和过去分词 );调制;编造;捏造
参考例句:
  • The soup was concocted from up to a dozen different kinds of fish. 这种汤是用多达十几种不同的鱼熬制而成的。
  • Between them they concocted a letter. 他们共同策划写了一封信。 来自《简明英汉词典》
3 eel bjAzz     
n.鳗鲡
参考例句:
  • He used an eel spear to catch an eel.他用一只捕鳗叉捕鳗鱼。
  • In Suzhou,there was a restaurant that specialized in eel noodles.苏州有一家饭馆,他们那里的招牌菜是鳗鱼面。
4 backbone ty0z9B     
n.脊骨,脊柱,骨干;刚毅,骨气
参考例句:
  • The Chinese people have backbone.中国人民有骨气。
  • The backbone is an articulate structure.脊椎骨是一种关节相连的结构。
5 jaws cq9zZq     
n.口部;嘴
参考例句:
  • The antelope could not escape the crocodile's gaping jaws. 那只羚羊无法从鱷鱼张开的大口中逃脱。
  • The scored jaws of a vise help it bite the work. 台钳上有刻痕的虎钳牙帮助它紧咬住工件。
6 weird bghw8     
adj.古怪的,离奇的;怪诞的,神秘而可怕的
参考例句:
  • From his weird behaviour,he seems a bit of an oddity.从他不寻常的行为看来,他好像有点怪。
  • His weird clothes really gas me.他的怪衣裳简直笑死人。
7 teaspoon SgLzim     
n.茶匙
参考例句:
  • Add one teaspoon of sugar.加一小茶匙糖。
  • I need a teaspoon to stir my tea.我需要一把茶匙搅一搅茶。
8 teaspoonful Ugpzi1     
n.一茶匙的量;一茶匙容量
参考例句:
  • Add a teaspoonful of mixed herbs. 加入一茶匙混合药草。 来自《简明英汉词典》
  • Add a teaspoonful of curry powder. 加一茶匙咖喱粉。 来自《简明英汉词典》
9 glands 82573e247a54d4ca7619fbc1a5141d80     
n.腺( gland的名词复数 )
参考例句:
  • a snake's poison glands 蛇的毒腺
  • the sebaceous glands in the skin 皮脂腺
10 swirl cgcyu     
v.(使)打漩,(使)涡卷;n.漩涡,螺旋形
参考例句:
  • The car raced roughly along in a swirl of pink dust.汽车在一股粉红色尘土的漩涡中颠簸着快速前进。
  • You could lie up there,watching the flakes swirl past.你可以躺在那儿,看着雪花飘飘。
11 defensive buszxy     
adj.防御的;防卫的;防守的
参考例句:
  • Their questions about the money put her on the defensive.他们问到钱的问题,使她警觉起来。
  • The Government hastily organized defensive measures against the raids.政府急忙布置了防卫措施抵御空袭。
12 predators 48b965855934a5395e409c1112d94f63     
n.食肉动物( predator的名词复数 );奴役他人者(尤指在财务或性关系方面)
参考例句:
  • birds and their earthbound predators 鸟和地面上捕食它们的动物
  • The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》
13 infiltrating 620042ea560f5ffb3cfe5515d442170c     
v.(使)渗透,(指思想)渗入人的心中( infiltrate的现在分词 )
参考例句:
  • Be vigilant against the danger of enemy agents infiltrating the government and boring from within. 要警惕敌特渗入政府内部进行暗中破坏。 来自《现代汉英综合大词典》
  • The metastatic melanoma is seen here to be infiltrating into the myocardium. 图示转移性黑色素瘤浸润到心肌。 来自互联网
14 recoiling 6efc6419f5752ebc2e0d555d78bafc15     
v.畏缩( recoil的现在分词 );退缩;报应;返回
参考例句:
  • Some of the energy intended for the photon is drained off by the recoiling atom. 原来给予光子的能量有一部分为反冲原子所消耗。 来自辞典例句
  • A second method watches for another effect of the recoiling nucleus: ionization. 探测器使用的第二种方法,是观察反冲原子核的另一种效应:游离。 来自互联网
15 essentially nntxw     
adv.本质上,实质上,基本上
参考例句:
  • Really great men are essentially modest.真正的伟人大都很谦虚。
  • She is an essentially selfish person.她本质上是个自私自利的人。
16 evolutionary Ctqz7m     
adj.进化的;演化的,演变的;[生]进化论的
参考例句:
  • Life has its own evolutionary process.生命有其自身的进化过程。
  • These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
17 primitive vSwz0     
adj.原始的;简单的;n.原(始)人,原始事物
参考例句:
  • It is a primitive instinct to flee a place of danger.逃离危险的地方是一种原始本能。
  • His book describes the march of the civilization of a primitive society.他的著作描述了一个原始社会的开化过程。
18 grotesque O6ryZ     
adj.怪诞的,丑陋的;n.怪诞的图案,怪人(物)
参考例句:
  • His face has a grotesque appearance.他的面部表情十分怪。
  • Her account of the incident was a grotesque distortion of the truth.她对这件事的陈述是荒诞地歪曲了事实。
19 corpses 2e7a6f2b001045a825912208632941b2     
n.死尸,尸体( corpse的名词复数 )
参考例句:
  • The living soldiers put corpses together and burned them. 活着的战士把尸体放在一起烧了。 来自《简明英汉词典》
  • Overhead, grayish-white clouds covered the sky, piling up heavily like decaying corpses. 天上罩满了灰白的薄云,同腐烂的尸体似的沉沉的盖在那里。 来自汉英文学 - 中国现代小说
20 marvels 029fcce896f8a250d9ae56bf8129422d     
n.奇迹( marvel的名词复数 );令人惊奇的事物(或事例);不平凡的成果;成就v.惊奇,对…感到惊奇( marvel的第三人称单数 )
参考例句:
  • The doctor's treatment has worked marvels : the patient has recovered completely. 该医生妙手回春,病人已完全康复。 来自辞典例句
  • Nevertheless he revels in a catalogue of marvels. 可他还是兴致勃勃地罗列了一堆怪诞不经的事物。 来自辞典例句
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TAG标签:   NPR  美国国家电台  英语听力
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