句间停顿:
  • 1S
  • 3S
  • 5S
语速: x 1.0
  • 速度0.8X
  • 速度1.0X
  • 速度1.2X
  • 速度1.5X
  • 速度1.8X
  • 速度2X
始终显示原文
欢迎使用 KMF 精听精研
坚持练习精听,反复听、吃透每个句子,能够快速 提升听力能力
开始精听
或按 「 空格」开始播放

段落1

This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

点击显示原文

隐藏原文=

If you're looking for signs of past life on Earth, some of the evidence is obvious.

点击显示原文

隐藏原文=

"Finding a trilobite fossil is a no-brainer, we all can understand that one, or a dinosaur bone."

点击显示原文

隐藏原文=

Jack Mustard, a Brown University geologist.

点击显示原文

隐藏原文=

He says less obvious signs of ancient life can be found in glass.

点击显示原文

隐藏原文=

Specifically, impact glass, which forms when asteroids slam into the planet, rapidly heating and melting the rocks around them.

点击显示原文

隐藏原文=

"Impact glass on the Earth can preserve biological material in a kind of capsule, a time capsule if you will."

点击显示原文

隐藏原文=

Here on Earth, for instance, scientists have found impact glass containing ancient plant matter, and other chemical signatures of life.

点击显示原文

隐藏原文=

Jack and his colleague Kevin Cannon have now spotted the same sort of impact glass on Mars, using the spectrometer on the Mars Reconnaissance Orbiter.

点击显示原文

隐藏原文=

Which means Martian glass might also hold evidence of life.

点击显示原文

隐藏原文=

If the Red Planet ever harbored life, that is.

点击显示原文

隐藏原文=

The glass is more than just a potential time capsule.

点击显示原文

隐藏原文=

Its mineral structure also makes it an attractive snack for certain microbes.

点击显示原文

隐藏原文=

"Microbes eat geologic materials.

点击显示原文

隐藏原文=

But it can be a really slow process.

点击显示原文

隐藏原文=

Glass on the other hand is something that is kinda like having a Dorito for a microbe,

点击显示原文

隐藏原文=

because you can just start chewing away at it, and it's quite delicious, and you just munch right through it."

点击显示原文

隐藏原文=

Meaning it also might be worth inspecting glass for anything living on it, not just trapped inside.

点击显示原文

隐藏原文=

The findings are in the journal Geology.

点击显示原文

隐藏原文=

So does this study suggest we should abandon the old "follow the water" mantra when looking for life?

点击显示原文

隐藏原文=

"I certainly think it would not lend itself to, let's change the course of this ship and follow the glass.

点击显示原文

隐藏原文=

But I think where we're at is developing significantly interesting hypotheses to explore."

点击显示原文

隐藏原文=

And the Mars 2020 mission, which will collect samples for eventual return to Earth, might just be the perfect opportunity to start.

点击显示原文

隐藏原文=

Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

点击显示原文

隐藏原文=
[ < 空格 > ]
当前句 /
/
  • 段落1
  • 第 1 句
  • 第 2 句
  • 第 3 句
  • 第 4 句
  • 第 5 句
  • 第 6 句
  • 第 7 句
  • 第 8 句
  • 第 9 句
  • 第 10 句
  • 第 11 句
  • 第 12 句
  • 第 13 句
  • 第 14 句
  • 第 15 句
  • 第 16 句
  • 第 17 句
  • 第 18 句
  • 第 19 句
  • 第 20 句
  • 第 21 句
  • 第 22 句
  • 第 23 句
  • 第 24 句

+ 创建收藏夹
保存 取消