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Hey, smart people, Joe here.
Imagine you're in a dark, dark forest.
It's cold, it's lonely.
You wonder who or what is out there, but you're afraid to call out or turn on a light because maybe whatever's out there might actually want to eat you.
So you sit quietly alone to some, this is what it feels like to look up at the stars from Earth.
There are hundreds of billions of planets in our galaxy.
Scientists now think hundreds of millions of them have conditions where life could arise.
When you look at it like that, it would be pretty remarkable if Earth was the only planet with intelligent life, and yet we haven't heard a peep from any intelligent species beyond Earth.
Why?
