The Marines will now have five water survival qualification levels: Basic, Novice, Competent, Proficient, and Advanced.

Crystal jellyfish have an eerie beauty: thanks to a natural protein, they emit a faint green glow. For decades, researchers ...

Advanced 3D reconstructions of the comb jelly’s aboral organ reveal a sensory system far more complex than scientists expected. The organ contains a wide variety of specialized cells and is closely ...

Why psychiatry’s diagnostic system may undergo major changes, and what the scientific debates over how mental illnesses should be defined are ...