Name: 【TED】James Green: 3 moons and a planet that could have alien life (3 moons and a planet that could have alien life | James Green)
Uploaded: 2017-09-30T23:33:15.000Z
Duration: 10 min 40 s
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Is there life beyond Earth in our solar system?

we really didn't take that very seriously until recently.

"It takes extraordinary evidence for extraordinary claims."

And the claims of having life beyond Earth

and they need to be everywhere for us to be able to believe it.

is first look for those ingredients for life.

for us to be able to be confident that life,

Well, I have to tell you that early in my career,

I didn't believe that they were beyond Earth

in any length of time and for any real quantity.

Venus is way too hot -- it's got no water.

the water in the solar system is all frozen.

But recent observations have changed all that.

It's now turning our attention to the right places

and really start to answer our life question.

So when we look out into the solar system,

We're concentrating our attention on four locations.

and then three moons of the outer planets:

Well, Mars we thought was initially moon-like:

we started a series of missions to go to Mars

and see if water existed on Mars in its past

And indeed we started to be surprised right away.

Our higher resolution images show deltas and river valleys and gulleys

which has been roving on the surface now for about three years --

has really shown us that it's sitting in an ancient river bed,

Curiosity has also drilled in that red soil

And we were really excited when we saw that.

we started to look at a number of craters.

dark lines would appear down the sides of these craters.

A few months ago the fairy tale came true.

We announced to the world that we know what these streaks are.

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【TED】James Green: 3 moons and a planet that could have alien life (3 moons and a planet that could have alien life | James Green)

extraordinary

material

evidence

consume