No one can avoid illness and death, particularly in aging, it often makes people feel very scared. The change of skin is an important symbol of human aging. In one's life, the skin will be from compact to sagging, this process often makes a lot of people feel hugely frustrated and helpless. But recently, scientists announced a magical potion that can make the person "rejuvenation". That might mean "immortality" is no longer a dream one day in the future.