A strange circle on satellite maps turned out to be a 390-million-year-old impact crater

An amateur astronomer searching satellite maps for a Quebec camping spot accidentally discovered a massive ancient impact crater. Scientists later found shatter cones that confirmed the 25-kilometer-wide structure was blasted into Earth roughly 390 million years ago. This story matters for Science & Discovery readers tracking student. Reported by sciencedaily.com. Read the full original at the source link below.