In the context of a disease, the transition from "epidemic" to "endemic" means a pathogen is no longer causing outbreaks but isn't disappearing.
The 9,000-year-old Jericho Skull now has a new face, thanks to the latest reconstruction techniques.
They're a popular way to track daily activity, but how do step counters work?
A type of crystal that breaks the rules of ordinary crystallography has been found in a tube of melted sand from Nebraska.