The Euclid space telescope has spotted the oldest quasars -- the brightest objects in the universe -- ever discovered, deepening a cosmic mystery that has been puzzling scientists. Quasars are powered ...

Londoner Zainab Hussain once saw air conditioning as a luxury in Britain. Now, the 35-year-old "can't see how we'll survive without it". She and her husband are among a small but growing proportion of ...