Bacteriorhodopsin

Bacteriorhodopsin is like a tiny, magical light bulb that lives inside certain types of bacteria. When it's in a place with a lot of light, it "charges up" like a battery. But when it's in a dark place, like inside a cave, it starts to glow! And the cool thing is, this glow can be used to do all sorts of things, like help the bacteria move or even create energy.

So basically, bacteriorhodopsin is a special molecule that can turn light into energy. It's a lot like how we use solar panels to turn sunlight into electricity. But instead of panels, the bacteria use this special molecule to harness the power of light. It's like they have tiny little superpowers!