Stars known as blue stragglers have pretty much discovered the cosmic equivalent of the fountain of youth - they should be old and nearly out of fuel, yet they continue to burn hot and bright blue like a young star.
A cannibalistic star sounds like something fit for a sci-fi flick, but it's a real thing. And it's called a "blue straggler."
Blue straggler stars are an astronomical mystery - they are bigger and age more slowly than stars born at the same time. It turns out these stars are created by two kinds of violent interstellar struggles.
Here are some vampires we don't mind sparkling. This globular cluster, Messier 30, contains two types of ancient stars that have managed to keep themselves brilliant and young. One type relies on interstellar collisions; the other drinks from its neighbors.