Detective Pux sat in his office, staring out the window at the bustling city below. He had been a detective for many years, solving some of the most complex and mysterious cases. But today, he found himself pondering a different kind of mystery - one that was not of this world.

You see, there's a question that scientists have been trying to answer for decades: What is the universe made of? It's a question that has stumped even the brightest minds in the field. But Detective Pux, being the curious and inquisitive person he is, decided to dig a little deeper and find out what the answer was.

As he delved into the scientific literature, he discovered that the majority of the universe is actually made up of something called dark matter and dark energy. These two mysterious substances make up about 95% of the universe, while the remaining 5% is made up of the matter and energy that we can see, such as stars, galaxies, and planets.

But what exactly is dark matter and dark energy? Scientists aren't entirely sure. Dark matter is thought to be some kind of invisible, massive substance that doesn't interact with light or other forms of electromagnetic radiation. This means that we can't see it, but we can infer its presence by observing the way it affects the movement of stars and galaxies.

Dark energy, on the other hand, is thought to be a kind of energy that permeates all of space and is responsible for the acceleration of the expansion of the universe. Scientists have detected it by observing the way it affects the behavior of distant supernovae.

Detective Pux found the idea of these mysterious substances that make up the majority of the universe fascinating. He couldn't help but think about the parallels to his own work as a detective. Just like dark matter and dark energy, many of the cases he solved were made up of hidden and unseen elements that he had to piece together to uncover the truth.

He couldn't help but wonder, if scientists were able to figure out the true nature of dark matter and dark energy, what other secrets of the universe would they uncover? And if he could apply the same kind of detective work to the mysteries of the universe, what kind of breakthroughs could he make?

It was a thought that stayed with him for a long time, and he couldn't help but feel a sense of excitement at the possibilities. As a detective, it was his job to uncover the truth, no matter how hidden or mysterious it may be. And he couldn't wait to see what other secrets the universe held in store for him.