"This is the dramatic moment a diver in the Bahamas had a very close encounter with a fearsome lemon shark. The 2.5 metre long fish is shown baring a menacing set of teeth as it breaks the surface at Tiger Beach during sunrise. Photographer Andrew Murch captured the shots during an eventful dive when the lemon sharks suddenly appeared within millimeters of his camera."
Supermassive Black Hole Found Spinning Nearly at the Speed of Light
Astronomers observed NGC 1365’s black hole using the NuSTAR and XMM-Newton observatories, and were surprised to find out it’s spinning so fast that the outer edge is moving at very nearly the speed of light!