They're tiny, blobby, butt-shaped, and glow in the dark. What the heck are they? Scientists are still figuring them out.

Some animals on land have evolved to produce light, too. Glow-worms are a group of beetles that use their luminosity to help them flag down an appropriate mate. Glow-worms belong to the family ...

The "blood worm moon," so named for the reddish hue of its glow and the time of year it's occurring, will be visible in every ...

While looking for the northern lights, also take time to admire the full Blood Moon total lunar eclipse, which begins just ...

And then, because we’re going to see this total lunar eclipse, it’ll give the moon a little bit of a reddish or bloodish color. They put together the fact that it’s a blood-looking moon with the fact ...

But one of the most arresting creatures is Arachnocampa luminosa, or the New Zealand glow worm, which emits a blue-green ...

One of the most ambitious and ultimately magical shoots of the entire series was trying to capture the mass spectacle of glow worms in a dark, wet forest. ...although their bioluminescence is easy ...

The moon reflected an ominous red color across the Midstate early Friday morning, and we have pictures. This morning, at around 3 a.m., early risers and astronomy fanatics across America had the ...