Tencent Technology (translated by You You) -- According to the American Scientific Daily, researchers from the Department of Biochemistry and Molecular Biology at the Thomas Jefferson University recently found that the level of a single protein in the body of a tiny worm called "C. elegans" can determine its lifespan. Worms that naturally lack this inhibitory protein (arrestin) live one third longer than normal worms, while those with three times the normal amount of inhibitory protein have a lifespan one third shorter than normal.