PTE听力口语练习-科学60秒-Dung Beetles

PTE考生目前最大的问题之一就是练习题缺乏。除了有限的基本官方书(PLUS,Testbuilder, OG)之外,就没有题了。很多英语基础不是很扎实的同学很难找到练习材料。墨尔本文波雅思PTE培训学校专门为墨尔本,悉尼PTE考生准备了适合PTE听力阅读练习的科学60秒。各位PTE同学可以练习PTE听力中的summarise spoken text和PTE口语中的retell lecture,PTE听力口语-科学60秒-Frosty Moss练习记笔记技巧和复述。废话少说,下面开始:


Dung Beetles Use Milky Way to Guide Movement (Heh)

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On moonless nights, dung beetles apparently use the Milky Way’s band of light as a navigation guide. Christopher Intagliata reports

Sailors don’t need to read the stars anymore—they’ve got GPS. But dung beetles do not have GPS. And it now appears that they use the Milky Way as a compass.

Dung beetles need a keen sense of direction so they can roll their dung patties away from the communal dung pile, and feast in peace. Ten years ago, Marie Dacke at Lund University in Sweden and her colleagues discovered that some dung beetles use polarized moonlight to keep a straight course. But what’s their plan on moonless nights?

Dacke tracked the beetles as they successfully rolled dung away from the center of a circular sandbox. Then she blocked the beetles’ starry view with tiny cardboard hats, and set ’em loose again. Without stars to guide them, the beetles traveling twisted, circular paths. Those findings appear in the journal Current Biology. [Marie Dacke et al., Dung Beetles Use the Milky Way for Orientation]

The beetles’ tiny compound eyes probably aren’t sharp enough to make out individual stars. In a planetarium, for example, when only 18 bright stars were illuminated, the beetles got lost. But the faint streak of the Milky Way seems to be just enough light to point them to a dung dining hole—no reservations required.

—Christopher Intagliata

 

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