What are these things?
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Two astrophysicists say they have a solution.
The results are in.
All that remains of a shredded galaxy.
So close we can practically taste it.
We could be looking at an undiscovered class of particles here.
For the first time, we may have detected the core of a gas giant.
Ultramassive and insatiable.
No, it's not the center of the Sun.