Walker J C, Sloan L C
Department of Geological Sciences, University of Michigan, Ann Arbor 48109, USA.
Geotimes. 1992 Jun;37(6):16-8.
We frequently forget that there is more to science than the making of a more precise measurement or a more elaborate calculation. It is even more than applying to new problems the methods that worked on old problems. These activities, which keep most of us busy most of the time, are important, but the new and unexpected discoveries are more important. And many radically new discoveries arise from scientific puzzles, the "anomalies." We believe that studies of past climates have exposed an anomaly that deserves attention and that may result in a fundamentally new understanding of the climate system. The poles have been much warmer throughout much of Earth's history than they are now. Ice-age episodes with durations of millions of years have been separated by periods of hundreds of millions of years that have left little or no evidence of polar ice sheets. The data are best for the most recent of these ice-free episodes so we will concentrate on the Eocene.
我们常常忘记,科学不仅仅是进行更精确的测量或更复杂的计算。它甚至不仅仅是将解决旧问题的方法应用于新问题。这些活动在大多数时间让我们大多数人忙碌不已,它们固然重要,但新的意外发现更为重要。许多全新的发现源自科学谜题,即“异常现象”。我们认为,对过去气候的研究揭示了一个值得关注的异常现象,它可能会让我们对气候系统有全新的根本认识。在地球历史的大部分时间里,极地比现在温暖得多。持续数百万年的冰河时期被长达数亿年的时期分隔开来,而这些时期几乎没有留下极地冰盖的证据。关于这些无冰时期中最近的一个时期的数据最为完善,所以我们将集中讨论始新世。