Earth's oceans are growing darker, threatening marine life worldwide: study

A new study using satellite data shows that over a fifth of the world's oceans have grown noticeably darker, which is bad news for marine life. The darkening affects the "photic zone"—the upper layer where sunlight penetrates—disrupting the delicate balance of ecosystems that rely on light for photosynthesis and survival. Researchers are sounding the alarm about the cascading effects this could have on everything from tiny plankton to the larger food chain.