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The Meteorite Impact: A Cataclysmic Event What would it have been like to have lived through the meteorite impact that wiped out the dinosaurs 66m years ago? Writing in the Conversation, Michael Benton, of the University of Bristol, and Monica Grady, of the Open University, describe in vivid detail how it might have felt. The Initial Blast and Its Immediate Effects The first sign that something was amiss would have been a new star visible for about a week before the event. Upon its arrival, all living creatures near the impact site would have seen the bright fireball, heard its crackling noise and experienced a sonic boom before being swiftly incinerated. The Global Devastation Five minutes later, 100-metre-high mega tsunamis rolled across the Gulf of Mexico and, combined with the overheating, earthquakes, hurricanes and fires, wiped out everything within a 1,200-mile (2,000km) radius. The Long-Term Consequences Dinosaurs roaming forests on the other side of the world were still oblivious, but not for long. Within an hour, dust had circled the planet and skies had darkened. Within a day, global temperatures were dropping, and by the end of the week the world was 5C cooler. A ferocious winter lasted for more than a decade, eliminating about 75% of all species. A Warning for the Future Our ancestors were some of the lucky survivors but, sadly, Benton and Grady suggest our penchant for burning carbon is setting the scene for a similar scale of planetary catastrophe.

NASA's Artemis II mission has achieved a major milestone with the successful return of its four astronauts to Earth, marking the end of a 10-day journey that took them farther into space than any human has gone before. The crew, comprising NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, along with Canadian astronaut Jeremy Hansen, completed a parachute landing in the Pacific Ocean off the coast of California at 5:07 pm Pacific time (00:07 GMT). This mission is a critical step towards future lunar exploration, particularly Artemis IV, which aims to land astronauts on the lunar surface for the first time since the Apollo era. The Artemis II mission tested essential technologies for deep space travel, including the performance of the Orion capsule's heat shield, navigation systems, and life-support technology. The mission also marked several historic firsts: Glover became the first person of color to travel around the moon, Koch the first woman, and Hansen the first non-American. During their journey, the crew witnessed a solar eclipse and meteorite impacts, and shared vivid descriptions of the lunar surface. Mission commander Wiseman reflected on the mission's significance, stating, "what we really hoped in our soul is that we could, for just a moment, have the world pause — and remember that this is a beautiful planet in a very special place in our universe".