Chandra X-ray Observatory observations of the Perseus galaxy cluster's black hole and M87's jet have been turned into sound by SYSTEM Sounds. The Chandra team explains how it was done.

Chandra X-ray Observatory observations of the Perseus galaxy cluster's black hole and M87's jet have been turned into sound by SYSTEM Sounds. Credit: NASA/CXC/SAO/K.Arcand, SYSTEM Sounds (M. Russo, A.

It has taken humans over 100 years to see a rare Antarctic gonate squid alive and swimming through the dark, cold ocean.