New Scientist is carrying this article describing the discovery of the largest field of impact craters ever found on Earth. Located in south-west Egypt, this area contains evidence of perhaps as many as 100 impacts over a nearly 2000 square mile area. Some of the impacts are a few yards across, while others are more than a mile wide. Dating is tricky, but the current working date is around 50 million years ago. Which is, on a geological timescale, suspiciously close to the 65 million year mark that saw the demise of the dinosaurs. It may turn out the sky fell on the dinos not just once, but multiple times.