Is it possible for creatures with intelligence more advanced than humans to evolve naturally in the universe?

Sexual selection. Intelligence is sexy. If you could tell a better story, make a better plan, make a better tool or weapon, you would be popular and get laid.

Possibly, for us, it was a combination of different things after it reached a certain level:

Social groups, and theory of mind. You needed to keep tabs on everyone in the group and understand their drives. Being able to negotiate. It takes intelligence to succeed with this.

Since the rise of feminism, the dating market has shifted to the disadvantage of men and that is causing this incel phenomenon. Why do women not understand how lonely the majority of men are?

So let's say that the aliens have fewer restrictions on brain size, and have more efficient brain wetware, and are subject to sexual selection for intelligence, then they will likely be much more intelligent than us.

Then we can wonder about the evolutionary selection pressure for intelligence.

And since the universe is so enormously big, it would be strange if we were the most intelligent creatures. Though, we will probably never find out.

What is the sum of X+XX+XXX+XXXX?

Human intelligence is limited by how the brain works, and how big the head on a baby can be.

Right here on Earth, birds have at least twice as dense brains as humans. That means that they cram at least twice the computing capacity in the same space as primates. If we had bird brains we might have been much more intelligent.

They may also not have the same limitations for the size of a birth canal. If they are similar to marsupials, the baby would be born very small and then develop in the pouch, without head restrictions of the birth canal.

Why do Democrats keep calling Patriots/President Trump supporters "sore losers"? Do they purposefully ignore the massive fraud that took place, or genuinely think that there was zero fraud?

Aliens may have more efficient brains than humans, like birds, or even more efficient than any animal on Earth.