How we know that Einstein's General Relativity can't be quite right?

We know that Einstein’s General Relativity can't be quite right because it doesn’t explain everything we see in the universe, like black holes and the way galaxies move.

Imagine you're playing on a trampoline. When you jump, you make a dent in the surface, that's how gravity works in Einstein’s theory: big things like planets or stars dent space-time, and smaller things fall into those dents.

But what if we saw something acting weirdly? Like a ball that bounces around in ways we didn’t expect. That’s kind of what happened with black holes, they’re so heavy that even light gets stuck!

Scientists have noticed some strange behavior, especially when looking at how stars move near black holes or how galaxies spin. It's like a ball on a trampoline that moves faster than it should, something is pushing it a little extra.

Einstein’s rules are super good, but they’re not perfect. They're like the instructions for a game, we’ve found some new pieces, and now we need to update the rulebook. That means General Relativity might be part of an even bigger story, one that we're still writing!