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.

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.

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.

Why are you bare-nakedly displaying your anti-Trump bias while ignoring the liberals' destruction of the US? I am now blocking your e-mails because of your biased articles.

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

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.

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.

Why do people hate Nickelback so much? What makes them different from other popular bands like Linkin Park, Green Day, etc.? Is it just because they're Canadian or what?

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

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

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

If English makes 3 additional gender terms to accommodate for XXX, XXY, and XYY people, what would be the most realistic terms for those genders?

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.