Despite more than a century and a half of speculation, these nude, faceless sculptures remain utterly enigmatic. Who made them? And what might they have been for?
Pilot fatigue is in the spotlight this week, with the news that one Indonesian flight had two sleeping pilots at its helm. But the military have a surprising solution.
As the clocks go forward in the UK this weekend, Zaria Gorvett investigates the strange Roman alternative to daylight saving time – and why an hour sometimes lasted just 45 minutes.
Guam has 40 times more spiders than neighbouring islands – and a population of invasive snakes so voracious, they have emptied the forests of every bird.