Understand the wormhole theory
We already know that the big bang happened (or that everything came from a point) because scientists have traced planets back in the way they are expanding. This is a very far distance. Since we know this much already with out even colonizing Mars yet, we may even figure out what caused the big bang.
Also, if we ever do figure out how to go at the speed of light, we could probably get rovers and probes, rovers, or even humans genetically engineered to withstand those speeds. However, the speed of light is very slow compared to the entire universe. In fact, some people on this website say that the universe is too large to find anything. However, scientists have very recently found that the wormhole theory (in terms of distance) could be possible. (A wormhole is a shortcut through spacetime that connects two distant places and takes a lot of energy. Some think we could get this energy from the sun through solar power.) This could help take us (or a probe or rover) from our solar system to another place millions of light years away very quickly. When you look at how far we’ve gotten today, and analyze the possibilities of the future, you can definitely see how humans may, one day, fully understand the universe.
YOUTUBE LINK: WORMHOLES(Einstein-Rosen Bridges)