Most of us have probably used a 9-volt battery. They power small household items such as clocks, smoke detectors, and toys.

The eels also had small eyes that were thought to be an adaptation to low-light conditions. They appeared to be sensitive to light and tried to hide when it was exposed to any kind of illumination.

A slimy air-breathing eel that can live out of water for months at a time is slithering our way. Biologists fear the Asian swamp eel could wipe out countless small native Florida fish and ...

EASTHAMPTON — Several mysteries surround American eels, a species that spends a portion of its life in Massachusetts. For example, no one has ever observed the species spawn, and only one has ...