In a groundbreaking new study, Over 20% of the Ocean Is Darkening: A Growing Threat to Marine Life and Climate Health. Scientists have revealed a concerning shift in the Earth’s oceans: over 21% of the global ocean an area larger than 75 million square kilometers has experienced ocean darkening over the last two decades. Published in Global Change Biology, the research points to a significant decline in light penetration into the ocean’s photic zones, the sunlit layers that support 90% of marine life. This alarming trend has vast implications for marine ecosystems, climate stability, and human wellbeing, sparking fresh urgency among scientists and environmentalists worldwide.