一般说来,生物具有视觉、嗅觉、触觉、味觉和听觉五种感觉。随着科学技术的发展,科学家们越来越获得更多的证据,生物能感到地球的磁场,至少以人们几乎没有意识到的各种方式利用这个信息。在细菌、蜜蜂、鸽子、海豚等身上都已发现有磁性物质—微小的一块块磁铁石。这些生物中多数已表明它们是利用地磁帮助测定它们四周的方向。近来有报告说,欧洲木鼠也利用一种体内罗盘。它的最重要的意义是证实了人 In general, creatures have five senses of sight, smell, touch, taste and hearing. As science and technology evolve, scientists are gaining more and more evidence that creatures can sense the earth’s magnetic field, exploiting this information in at least a variety of ways that people hardly ever realize. Magnets have been found in bacteria, bees, pigeons, dolphins and the like - tiny pieces of magnetite. Most of these organisms have shown that they are geomagnetic to help determine the direction of their surroundings. Recently there have been reports that European wood rats also use an internal compass. Its most important significance is confirmed by people