Birds and sea turtles can migrate thousands of miles, by reading the Earths magnetic cues. But we too might have magnetic sensing abilitiesin our eyes. So says a study in the journal Nature Communications. [Lauren Foley, Robert Gegear and Steven Reppert, Human Cryptochrome Exhibits Light-Dependent Magnetosensitivity]
Previous studies suggest long-distance migratorsand even fruit fliespick up magnetic fields with the help of a light-sensitive protein called cryptochrome. We produce cryptochrome toowithout it, our circadian clocks would break. Human cryptochrome doesnt require light to function, thoughand it doesnt seem to give us a phenomenal sensitivity to magnetic fields. But can it do more than keep the circadian clock ticking?考试大考试大成就你的梦想
To find out, researchers took out fruit flies usual cryptochrome gene and inserted the human version. And the transgenic flies had no problem navigating a magnetic maze when exposed to lightindicating the human protein can still serve as a light-sensitive magnetic sensor.
We happen to have a lot of cryptochrome in our retinasideally situated to receive light. Which suggests we might be able to see magnetic fields in some way. On the other hand, evolution might have just given cryptochrome a new job in new organisms. So dont throw away your GPS.
浪漫英文情书精选:My Love Will Reach Any Distance爱无边
美文美诗:仙女对牧羊人的回答
双语美文:在思考中成长
精选英语美文阅读:一封未发出的英文情书《但是你没有》
啊,我讨厌英语 Gullia Oops Jaime Pas Langlais 这首歌是不是也唱出你的心声了
双语美文欣赏:孤独人生
精选英语散文欣赏:微笑挽救生命
精选英语散文欣赏:平等的爱
精选英语美文阅读:爱的奇迹 Keep on Singing
精选英语美文阅读:木鱼声声
精选英语美文阅读:无雨的梅雨天 (双语)
精选英语散文欣赏:月亮和井
浪漫英文情书精选:My Heart And Soul我的灵魂
如果生命可以重来(双语)
浪漫英文情书精选:I'll Be Waiting我会等你
精选英语美文阅读:爱他就把他留下来 (双语)
精选英语美文阅读:A Friend's Prayer 朋友的祈祷
浪漫英文情书精选:Boundless Love无边的爱
精选英语美文阅读:你见或者不见我(中英对照)
精选英语美文阅读:在你的镜头前,我总是很美
精美散文:我就是我
美文阅读:青春物语
伤感美文:人生若只如初见
美文:爱的奇迹
精选英语散文欣赏:一棵小苹果树
精美散文:守护自己的天使
精美散文:抬起头来 希望就在眼前
精选英语美文阅读:朋友的祈祷
Love Your Life 热爱生活
精美散文:27岁的人生
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |