The tag team of NASA space telescopes Hubble and Chandra has demonstrated that two is definitely better than one when it comes to pairings of supermassive black holes and hunting for them.

These 2 monster black holes may be the closest pair ever discovered in visible and X-ray light (video)

Source: space
Source Link: https://www.space.com/supermassive-black-hole-duo-chandra-hubble