Each spring, the sky comes alive along Montana’s Rocky Mountain Front. Huge flocks of migrating geese, swans and other birds ...

The skies over Europe recently took on a dramatic orange hue, leaving many residents staring in awe and sometimes confusion ...

But moonbows are much more rare than rainbows—the natural phenomenon happens only when the moon is very low, the sky is dark, and rain is falling opposite the moon. Check out the biggest unsolved ...