Weather Blog Blast From the Past: Vredefort Crater The world’s oldest and largest known impact structure shows some of the most extreme deformation conditions known on Earth. Read More… About Author OTW Observer See author's posts Continue Reading Previous: Wimbledon close to its hottest day ever as temperatures soar past 34CNext: Tropical Storm Chantal could Develop… Related Stories Blast From the Past: Sweden’s Siljan Ring Weather Blog Blast From the Past: Sweden’s Siljan Ring July 6, 2025 Blast from the Past: Deciphering India’s Luna Crater Weather Blog Blast from the Past: Deciphering India’s Luna Crater July 5, 2025 Blast From the Past: Arizona’s Meteor Crater Weather Blog Blast From the Past: Arizona’s Meteor Crater July 4, 2025