There’s a story going around the popular press about using quasars to determine whether free will exists. This stems from an MIT press release which talks about using quasars to “close the free will loophole.” Needless to say, the actual paper published in Physical Review Letters isn’t really about free will, but rather about an interesting effect of quantum mechanics. …
Fixed Point
Quasars are both very bright and very distant. Because of this we can use them as reference points when determining the positions of astronomical objects.
Superluminal
There are examples of a mass of plasma (a jet) leaving a quasar at a speed that appears to be faster than light. But this turns out to be an interesting optical illusion.