Sleep may have evolved to help reduce DNA damage in nerve cells long before they became centralized in the brain, a study ...

Ginger Zee swims in a lake filled to the brim with 20 million jellyfish. — -- Welcome to Palau! The string of over three hundred tiny green islands, 3 degrees north of the equator in the North ...

Jellyfish sleep around eight hours a night, take short daytime naps, and compensate for lost rest,all without having a brain.

They don’t have a brain or spinal cord. They float around in a way that often appears aimless. Though jellyfish lack a central nervous system, these gelatinous creatures again show that they might ...

Researchers at the University of Kiel, and at the University of Copenhagen have demonstrated that Caribbean box jellyfish (Tripedalia cystophora) can learn at a much more complex level than previously ...

Marine scientists document new records of venomous box jellyfish in the Philippines, aiding biodiversity and venom research.

Most people think the great white shark is the ocean predator they should fear the most. However, this type of jellyfish, statistically speaking, is much deadlier. Sharks are probably the animal that ...

WICHITA, Kan. (KSNW) — Kansas is home to various unique and even rare species of animals, including the cave salamander and the black-footed ferret. It’s also home to a creature that is definitely a ...

Studying ancient sea creatures’ snoozing habits could shed light on the origins of sleep.