Ice skates made of bone have been unearthed from a Bronze Age tomb in western China, suggesting an ancient technological exchange between the east and west of Eurasia.
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.
An orca killing spree continues in South Africa. Their target: shark livers.