Four jet-black spheres clung to a rock on the Pacific seafloor at roughly 20,300 feet, stopping a research crew in its tracks. They looked like eggs, but their color, shape, and shine felt off-script for the deep ocean. Back on deck the mystery held. These were not fish eggs at all but hard little capsules called cocoons, each sheltering several …
Read More »Egg capsules of flatworms found in one of Earth’s deepest trenches
