Grumpy Old Geeks Topics Perseus cluster X-ray anomaly Topic Perseus cluster X-ray anomaly 2 mentions in 1 episode The hosts discuss an unexplained X-ray signal reported from the Perseus cluster. Mentions 69: Rabbit Rabbit Aug 1, 2014 40:06 There is some anomalous data coming out that cannot be explained as of yet. 40:22 It's like a frequency of X-ray that shouldn't actually be physically possible.