In the summer of 1971, a young geologist named Mike Voorhies was scouting around on some grassy farmland in eastern Nebraska, not far from the little town of Orchard, where he had grown up.

1971年夏，一位名叫迈克·沃里斯的年轻地质学家在内布拉斯加州东部一片草木丛生的农田里考察，就在离果园小镇不远的地方。