To give you an idea as to how big the entire cosmos is, take a look at this fact.
If you take all the grains of sand ever found on Earth and piled them up and counted, and then counted all the stars in the entire cosmos, you will see that there are more stars out there than all the grains of sand that you have gathered.
So, the basic answer to humankind's first question is "YES, there is life elsewhere in the cosmos".
But then comes an even bigger question. Where the H377 are they??

Believe it or not, even with our most advanced technology of today along with decades of satellite and telescope observations, we human beings have only managed to scan and document about not even 5% of the cosmos.
This is because our current satellites and telescopes are limited in power and range.
The cosmos is so huge, it's like the world wide web. It's so big that no one can control it.
Here's another example.
Imagine you and a friend are in a football stadium. You are at one end of the stadium and your friend is at the other.
Your friend's job is to light one match once every hour for a few seconds or less. Your job is to close your eyes and open them once every hour for a few seconds or less.
While your eyes are opened, you have to quickly look for the match light that your friend made.
You think this is hard? Imagine this at a cosmic scale.
