Parallel Universe

It was hard for me to believe the Space Travel episode from the Universe. It mentioned the creation of particles, and that a certain one can only go faster than the speed of light, never slower.  They also talked about bending time or space, like warping the path, which seemed a bit like time travel but also teleportation. They have ideas about traveling somewhere, but instead you bring ‘somewhere’ to you. These abstract ideas are just so hard for me to imagine. I understand technological advancements and how humans and everything else reacts in different environments. I feel like they are making up impossible ‘what if’ ideas, like what if we could do this or that, but it actually can’t happen. Isn’t time a concept we created? I don’t see how they could go further faster in any other way than making faster transportation. I can’t imagine how they would bend space, or make a parallel universe. It is scary to think about and I can’t imagine how they would even try to make that happen.