So 20 Billion years ago there was a Big Bang where nothing exploded and produced everything 4.6 billion Years ago the Earth cooled down made a hard rocky crust which turned into a soup and the soup came alive 3 Billion Years ago found somebody to marry, eat something and slowly evolved to everything we see today.

Everyone can clearly see Birds and Bananas are Related

, why are there still Monkeys?
First error: not 20 billion years but 13.8.
Second error: 3 billion years ago there was no marriage
Third error: Birds are descendants of the dinosaurs, bananas are vegetables so there is no direct relation (but both are way more intelligent than you)
Fourth error: There are still monkeys because they are simply another branch of evolution, as like as thousands of other species.
Hint: the amoeba exists since 650 million years ago and made it to our time without the need of a brain... so you've some hopes to have descendants.
Grab a book and study, go to a museum, make up some real knowledge instead of wasting your time posting bullshits in this forum!