Scientists Study Tiny Creatures With Big Impact on the Ocean

It’s not just human workers who commute each day. Millions of tiny creatures that form the base of the ocean food chain migrate in giant swarms each night. They go up and down - from deep waters to the surface to feed, then back to the depths as dawn breaks. Scientists are looking at how this vertical commute affects the ocean, which is a key regulator of climate by storing and transporting heat, carbon, nutrients and freshwater around the world.