**Scientists discover a Greenland shark that’s nearly 400 years old — still swimming since the 1600s! 🦈❄️** Deep beneath the icy waters of the North Atlantic, researchers have found a female **Greenland shark** estimated to be almost **400 years old**, making her the **longest-living vertebrate ever recorded.** Using radiocarbon dating of her eye lenses, scientists believe she was born around **1620** — long before electricity, airplanes, or even the light bulb existed. These mysterious giants