英语听力：黑洞吞噬—26

To walk here on Earth, to be alive, it thanks to a long chain of cause and effect written deep into the structure of the universe. A primordial process so long, and so ancient that on the scale of a human life it seems almost incomprehensible.

One of the most amazing things in our universe is that we are made of stars. The heavy elements in our bodies,the carbon and the oxygen, the nitrogen, used to be, millions of miles down inside stars.

So our existence here, on this planet, relies on a deep history of stars being born, creating new elements,and speaking as elements back out into the cosmos where they are in turn recycled many many times.

Over and over again for almost 14 billion years ever since the beginning of the universe and the formation of the first stars. Black holes have influenced this cosmic recycling process. And since the elements forged in those stars ended up inside planets like our own,it means our black hole must have created the conditions to make it, just right,for life to emerge here on Earth.

We are very lucky. We are not close-by enough to have won this in a feeding frenzy that we get washed crossby this destructive radiation that will tear apart our molecules and our atmosphere, and basically leave us in a barren place.

And there’s the other extreme, where things are extremely quiet and cold and maybe there haven’t been any stars formed there ever, because nothing stirred it up. And nothing really got process these going that would make all the elements make new generation son planets in sum.

It means our black hole, must have left its finger prints on the unique chemistry that made possible the first stirrings of life here on Earth.