An article(with pictures) on the petroglyphs: https://www.newscientist.com/article/dn9273-native-americans-recorded-supernova-explosion/ https://www.newscienti

An article(with pictures) on the petroglyphs: https://www.newscientist.com/article/dn9273-native-americans-recorded-supernova-explosion/ https://www.newscientist.com/article/dn9273-native-americans... I'd be skeptical too