Experts say a "concerning" number of fireflies are threatened with extinction. Above, fireflies light up the sky in upstate New York. Raphaël De Cock was 9 years old the day he caught his first ...

Downtown Tulsa, Greenwood, and surrounding areas will glow green this weekend in a powerful symbol of unity and remembrance ...

Rays and sharks can turn neon green, while nearby coral come alive in electric reds. And hawksbill sea turtles? Under ultraviolet light, they turn into glow-in-the-dark, underwater Christmas ...