"Mysterious Magnetic Anomalies Suggest Massive Utah-Sized Asteroid Crater, Study Reveals"
A massive object with "magnetic anomalies" buried deep beneath the Australian outback is likely the largest asteroid crater ever found on Earth, according to a study. Known as the Deniliquin Structure, the underground object has a minimum diameter of 273 miles, surpassing the Vredefort impact structure in South Africa. Geophysical data and core samples suggest that the crater is approximately 445 million years old and may have caused a mass extinction event. The discovery adds to the 30 known craters on the Australian continent, with the oldest dating back over 1 billion years.