It's often more helpful to explain why things work in terms of the physics we understand right now that not at all. Sure, it's dissatisfying to hear "the arrows

It's often more helpful to explain why things work in terms of the physics we understand right now that not at all. Sure, it's dissatisfying to hear "the arrows can't stretch because that's the way it is", but it's a useful metaphor that can help explain time dilation and why we can't go faster than light. Physics answers often end up with "because that's the way it is", but that doesn't mean that the things you've learned up until then are useless.