explain time travel

Time travel is one of those things that sounds really cool, like you could go back in time and change things, but it’s actually impossible! It’s like trying to put toothpaste back in the tube – it’s just not happening. Plus, there are all sorts of paradoxes that come with it, like if you go back in time and kill your own grandfather, then you’d never be born! It’s a fun idea to think about, but it’s probably never gonna happen. Fun fact: the world’s first time machine was actually a telephone booth!