原文已被隐藏，你可用 快捷键 - 或点击 显示原文 按钮来查看原文
第1段
1 .This is Scientific American's 60-Second Science. I'm Allie Wilkinson. Got a minute?
该句暂无译文！
2 .(Music)
该句暂无译文！
3 .The color of Rudolph's nose has long been the talk of the town.
该句暂无译文！
4 .But the color of his eyes may be more interesting.
该句暂无译文！
5 .Because Arctic reindeers' eyes change color with the seasons, from gold in the summer to deep blue in the winter.
该句暂无译文！
6 .Changes to a tissue layer in the eye called the tapetum lucidum are responsible for the color change,
该句暂无译文！
7 .the purpose of which seems to be to change the sensitivity of the retina to different wavelengths of light.
该句暂无译文！
8 .That's according to a study in Proceedings of the Royal Society B.
该句暂无译文！
9 .The shift in wavelength depends on the spacing of the collagen fibers in the tapetum lucidum.
该句暂无译文！
10 .The smaller the spacing, the better the retina is at picking up light at shorter wavelengths, including into the near ultraviolet.
该句暂无译文！
11 .By extending the reindeers' visual range, this unique adaptation allows them to see better in the continuous darkness of winter in the Arctic reindeers' habitat.
该句暂无译文！
12 .Perhaps Rudolph with his nose so bright wasn't needed to guide Santa's sleigh after all.
该句暂无译文！
13 .He could have used any reindeer with its eyes so blue.
该句暂无译文！
14 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Allie Wilkinson.
该句暂无译文！