Strange red specks appeared in the telescope's first images, defying explanation for two years. They turn out to be something extraordinary: infant black holes hidden in cosmic cocoons.
Enrico Fermi's lunchtime question has haunted scientists for decades. With thousands of exoplanets now discovered, we're finally getting closer to an answer, and it might not be the one we wanted.
The largest black hole collision ever recorded created a monster 225 times the mass of our sun, challenging what physicists thought possible about stellar evolution.