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

Despite their name, glow-worms aren't worms at all: they're beetles. They use their bioluminescent bodies to communicate with other beetles, in an attempt to attract a mate. The ocean is well known ...

McNally puts the transparent worm under a microscope, focuses on a single egg cell and records videos as the different proteins — marked by their red, green or blue glow — delicately maneuver ...

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

For night owls in New York City, tonight offers the perfect excuse to stay up late. It’s a chance to witness the "Blood Moon" total lunar eclipse!