4,000 meters below sea level, scientists have found the spectacular ‘dark oxygen’

A study analyzing these modules reveals that these rocky lumps are capable of producing “dark oxygen” 4,000 meters below sea level where light cannot reach.
NPR

Why some species in the deep sea get bigger, while some species get smaller

Thousands of meters below the ocean's surface lurk some gigantic creatures, much larger than their shallow-water brethren. Scientists have a few hunches for why this happens, but the debate continues.
Yahoo

4,000 Meters Below Sea Level, Scientists Have Found the Spectacular 'Dark Oxygen'

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Scattered across an abyssal plain known as the Clarion-Clipperton Zone (CCZ) are polymetallic nodules ...
AOL

4,000 Meters Below Sea Level, Scientists Have Found the Spectacular ‘Dark Oxygen’

Scattered across an abyssal plain known as the Clarion-Clipperton Zone (CCZ) are polymetallic nodules that are a potato-sized prize for mining companies in search of materials needed for humanity's ...