“I couldn’t believe my eyes,” said Esra Bulbul of the Harvard Center for Astrophysics in July of 2014 of a still unfolding story about a strange signal that appeared not to come from any known type of matter detected in the x-ray spectrum in the Perseus Cluster –one of the most massive known … Continue reading “I Couldn’t Believe My Eyes”–A Strange Signal from One of the Largest Objects in the Cosmos