Scientists Say Dolphins Have a Seventh Sense科学家说海豚有第七感

It is well known that we have five senses. Some people believe they have sixsenses. They say their sixth sense is the ability2 to know something without using thecommon five senses of sight3， hearing， smell， touch and taste.

Scientists have just found that some dolphins have seven senses. Researchers inGermany say some dolphins can sense electricity4 of their prey5. The dolphins cannotice the electric pulses6 produced by the heart beats of other sea animals. Thiscould help dolphins to find their next meal. Dolphins also use their excellent eyesightand sonar7 to sense what is around them. This seventh sense may also help them tofind their directions using Earth’s magnetic8 field.

The researchers made a study of two dolphins named Dolly and Donna. Theytested what kinds of electricity the dolphins could find. Dolly and Donna could senseboth kinds of electricity—direct current9 and alternating current10. They were a lotbetter at picking up direct current. All animals or plants produce direct currentelectricity in water.

The researchers say dolphins can notice this. It means they may be able to knowhow near other fish are to them. Sometimes the water is cloudy， so they cannot usetheir other senses. In this case， they could use their seventh sense to look for food，even if they cannot see or hear well.

The researchers think there’s just so much to find out. This study is just thefirst page of a book.

众所周知，我们有五种感官。有些人相信他们有六种感官。他们说第六感是不用视觉、听觉、嗅觉、触觉和味觉这五种感官就能知道某件事的能力。

科学家刚刚发现一些海豚有七种感官。德国研究人员称，有些海豚能够感觉到猎物的电流。海豚可以察觉到其他海洋动物心跳产生的电脉冲。这可以帮助海豚找到它们的下一餐。海豚还利用它们出色的视力和声纳来感知周围的事物。这种第七感也可以帮助它们利用地球磁场找到方向。

研究人员对两只名叫多莉和唐娜的海豚进行了研究。他们测试了海豚能发现哪种电流。多莉和唐娜能感觉到两种电流———直流电和交流电，它们更擅长接收直流电。所有的动物或植物都能在水中产生直流电。

研究人员表示，海豚可以注意到这种电流。这意味着它们或许可以知道其他鱼离它们有多近。有时水是混浊的，所以它们无法使用其他感官。在这种情况下，即使它们看不见或听不见，它们也可以使用第七感来觅食。

研究人员认为有太多的东西有待发现，这项研究只是一个开始。

（英语原文选自：breakingnewsenglish.com）