Pair of distant ‘baby’ black holes appear to be misbehaving – experts are perplexed

The study was the first 'spectral variability' survey to study how galaxies change brightness at different frequencies.

from http://www.firstpost.com/tech/science/pair-of-distant-baby-black-holes-appear-to-be-misbehaving-experts-are-perplexed-9280871.html