On the way, I passed over the Manicouagan Crater, one of Earth’s largest, and recognizable on maps and from the air by a large circular lake surrounding a mountain of impact-melted rock.

ESA explains. Nördlinger Ries Ouarkziz Crater Tenoumer Crater Gosses Bluff Siljan Ring Roter Kamm Manicouagan Crater Shoemaker Crater Aorounga Crater Meteor Crater Credit: ESA Donald Trump ...