Discovering a portal to another universe and traveling through it is currently purely speculative and falls within the realm of science fiction. Our current understanding of the universe is based on the laws of physics as we know them, and there is no empirical evidence or theoretical framework that supports the existence of portals to other universes.
However, it's worth noting that the field of theoretical physics continues to explore various ideas and concepts, including the possibility of multiple universes or parallel dimensions. Some theories, such as string theory and the multiverse hypothesis, propose the existence of other universes or dimensions beyond our own. However, these ideas are still highly theoretical and lack direct experimental confirmation.
While scientific progress and technological advancements have surprised us in the past, it is impossible to accurately assess the likelihood of discovering and traveling through portals to other universes. It would require a significant shift in our understanding of physics and the development of technologies that currently lie far beyond our capabilities.
For now, our best bet is to continue pushing the boundaries of scientific knowledge and exploring the mysteries of the universe through methods such as space exploration and particle physics research.