This week is the best time in May to view the night sky. Here's everything you can see during May's dark skies, from an upside-down bear to some of the oldest stars in the universe.

Analysis of a mummy kept for a century at the University of Turin in Italy has revealed rare face tattoos made with a special black ink.

Researchers have developed new contact lenses that enable vision in the near-infrared range, and they could restore color perception to people with color blindness.

A retired researcher has detected an unusual pulse in the light of nearby stars while looking for signs of extraterrestrial intelligence. Aliens are one possible explanation for the strange signal, but as with every other unexplained space phenomenon, it's probably not aliens.

A gold ring with a red gemstone found in Israel dates to the Hellenistic period and may have been buried in a coming-of-age ritual.

Teeth are sensitive because they evolved from sensory tissue in both ancient vertebrates and ancient arthropods.