Since December 2021, when the James Webb super telescope saw first light, some 1.5 million kilometers from Earth, researchers around the world have been scratching their heads over unexplained red dots among stars and galaxies in the images taken by the telescope. The so-called ‘little red dots’ can be seen when the Universe was “only” several hundred million years old, and a billion years later, they seem to disappear again. So what were they?