(Read about nature’s living fireworks—animals that bioluminesce.) If you shine a light on a comb jelly, light refracted off its moving cilia might be mistaken for bioluminescence. Their true ...

A deep, grainy 4K background with a purple gradient and soft light accents. Ideal for creating moody, abstract wallpapers, banners, and artistic backdrops A deep, grainy 4K background with a purple ...