Here's what we know (and don't know) about China's mysterious space plane, which just landed after nine months in orbit on a secret mission.
Our weekly roundup of the latest science in the news over the past few days, as well as a few fascinating articles to keep you entertained over the weekend.
An inscription on an 1,100-year-old breastplate found in a ruined fortress in Bulgaria may contain one of the earliest known examples of Cyrillic text, researchers claim.
There are some bone-chilling places on Earth, but what is the lowest temperature ever recorded and where was it?