An orca killing spree continues in South Africa. Their target: shark livers.
The National Science Foundation zooms in on the tattered scraps of SN 185, which appeared over our planet 1,800 years ago and was the first supernova ever recorded in Earth's skies.
Astronomers have detected enormous shockwaves rattling the cosmic web that connects all galaxies in the universe, offering vital clues on how the largest structures in space were shaped.
A sphinx found at an ancient Egyptian temple may depict the face of the Roman emperor Claudius, but not everyone agrees with this interpretation.