Here is a list of five things about our universe that scientists cannot explain as of today:

1. **Dark matter and dark energy:** These two mysterious substances make up over 95% of the universe, but scientists don't know what they are or how they work. Dark matter is thought to be a type of matter that does not interact with light, which makes it very difficult to detect. Dark energy is thought to be a force that is causing the universe to expand at an accelerating rate.
2. **The origin of life:** How did life first arise on Earth? This is one of the most fundamental questions in science, and scientists are still not sure of the answer. There are many different theories, but none of them have been definitively proven.
3. **The nature of consciousness:** What is consciousness? How does it arise from the physical brain? These are questions that have puzzled philosophers and scientists for centuries. There is no scientific theory of consciousness, and it is unclear whether such a theory is even possible.
4. **The universe before the Big Bang:** What happened before the Big Bang? What caused the universe to come into existence? These are questions that are beyond the reach of current scientific knowledge.
5. **The existence of other universes:** Are there other universes besides our own? If so, what are they like? These are questions that are highly speculative, but they are fascinating to think about.

Scientists are working hard to answer all of these questions, and they are making progress. However, it is clear that there is still much that we do not know about our universe. These five mysteries are just a few examples of the many things that scientists are still trying to understand.
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