It can be the worst, most frustrating feeling. You're desperate to make contact, but you keep trying and trying. Why is no one picking up? Why does no one ever answer? Now, imagine that what you're trying to contact isn't a single person or a business

or even another country. What you're trying to contact is the entire universe. Why is there no answer?

I know that I can't convince you that we are not alone in the universe or that we are all alone.

But by the end of this episode, I think you'll have a very different take on the biggest question a human gazing at the infinity of the stars can ask, where is everybody?

And they got a small beam of light against the mirror.

True, weird, weird weird stuff.

The sound you're hearing right now actually is the sound of the universe.

Well, one very tiny corner of the universe anyway. You're listening to Audio Collective by NASA's Voyager Mission. The two Voyager

probes were launched within 15 days of each other way back in 1977, and for more than

45 years, the two Voyager probes have been busily chugging deeper and deeper into space,

all the while gathering data and sending back to Earth every single day.

This is mind-boggling enough when you consider that the Voyager mission was designed to run for about four years,

and even more mind-boggling that the devices

have now weathered decades in the punishing vacuum of space. It's only a couple hundred degrees

below zero out there. There's at least three different kinds of radiation to cope with,

and there's no way to repair even minor damage or malfunctions. The Voyager probes are tiny and vulnerable.

You could even say humble, machines.

And yet, those little gadgets are the first human-made objects

to cross the invisible boundary into interstellar space.

And even power down to the bare minimum,

as they now are, the Voyager probes will continue their unimaginably lonely journeys through the

cosmos for a long time to come. Longer than the longest human life. A span of time so immense

...