亚洲精品无播放在线播放,精品国精品自拍自在线,免费国产污网站在线观看不要卡,97色欧美视频在线观看,久久精品本无码一本,国产精品高清视亚洲一区二区,全部无码特级毛片免费播放

 

Top 10 animals with incredible vision

By Xu Lin
0 Comment(s)Print E-mail China.org.cn, April 5, 2014
Adjust font size:


Crocodile





An ancient animal, the crocodile is regarded a "living fossil." It also has a pair of highly evolved eyes. Thanks to their unique location, the eyes can reach above the water surface even when the head stays under. Endowed with very good night vision, this creature is a nocturnal hunter. It has vertical-slit shaped pupils, similar to domestic cats, which can exclude light more effectively than circular pupils, helping protect its eyes during daylight. The tapetum lucidum -- something like a mirror -- on the rear wall of the eyes can reflect incoming light back onto the retina, which best utilizes the smallest amount of light available at night.

<  1  2  3  4  5  6  7  8  9  10  >  


Follow China.org.cn on Twitter and Facebook to join the conversation.
ChinaNews App Download
Print E-mail Bookmark and Share

Go to Forum >>0 Comment(s)

No comments.

Add your comments...

  • User Name Required
  • Your Comment
  • Enter the words you see:   
    Racist, abusive and off-topic comments may be removed by the moderator.
Send your storiesGet more from China.org.cnMobileRSSNewsletter
  • <th id="fomfv"></th><noscript id="fomfv"></noscript>

    <fieldset id="fomfv"><font id="fomfv"></font></fieldset><sup id="fomfv"><menuitem id="fomfv"></menuitem></sup>

    1. <dfn id="fomfv"></dfn>
        1. 亚洲精品无播放在线播放,精品国精品自拍自在线,免费国产污网站在线观看不要卡,97色欧美视频在线观看,久久精品本无码一本,国产精品高清视亚洲一区二区,全部无码特级毛片免费播放 毛片无码免费无码播放 国产精品美女乱子伦高潮 久久男人av资源网站无码 亚洲精品中文字幕AV一本 国产成年无码V片在线 特级毛片直接看不用下载 亚洲深夜无码视频