With an American TikTok ban threatening the app, users and creators reflect on what it did for internet culture – and what their online worlds might look like without it.

The air we breathe can have profound effects on our physical and mental health. Is there any way of protecting yourself from this pervasive problem?

LA residents rushing to flee wildfires this week faced choke points, gridlock and the tough decision of whether to abandon their cars to the fire.

From more vegetation to flying embers, the BBC Earth team look at why the fires in LA have been so intense and why they've grown so rapidly.

Hot "hairdryer" winds that whip down mountainsides may become more of a problem with climate change.

The winter vomiting bug is highly infectious and fast to evolve, but people who are unusually immune to the virus could help us beat it.

The Geminids are an astronomical highlight of the year, creating a spectacular show of shooting stars every December. Scientists are now starting to understand where they came from.

Many international travellers will soon need to register for an online authorisation before touching down in the UK or many EU nations.