Study reveals more about the dinosaurs' death
New estimates of how much sulfur that ended up in the atmosphere after an asteroid impact show that the sulfur played a smaller role in the dinosaurs' extinction than previously thought.
Sweden
USA prepares for giant hurricane
Schools are closing and people are being evacuated as parts of the southeastern coast of the USA prepare for Hurricane Helene – which is expected to be unusually strong. Don't compare it to any other storm you've experienced in recent years, warns Robbie Berg, coordinator for hurricane warnings.
World