The James Webb Space Telescope just found the oldest known pair of black hole-powered quasars, called J1602+4228AB (or Napowawa`enakaulua).
These cosmic giants popped up only 900 million years after the Big Bang and each one is powered by a supermassive black hole, one weighing in at 1.5 billion times our Sun, the other at 400 million.
Even cooler: they're surprisingly close together, just 18,100 light-years apart.
Quasar discovery challenges growth models
Finding such massive black holes so early in the universe throws a curveball at what scientists thought about how these monsters grow.
Current models said it should take at least 1 billion years for black holes to get this big.
Now, researchers will need to rethink how fast supermassive black holes, and maybe even galaxies, can form right after the first stars lit up space.