Joshua Harvey: 人眼的进化－ Joshua Harvey

人眼的进化－ Joshua Harvey

查看完整的影片：http://ed.ted.com/lessons/the-evolution-of-the-human-eye-joshua-harvey
人类的眼睛是一个了不起的机制，能够检测任何位置，小到几个光子，大到直射的阳光，而且能在三分之一秒内把焦点从你面前的屏幕切换到遥远的地平线。这些复杂的结构是怎么发展？ Joshua Harvey 详细介绍了人眼5亿年的故事。
课件由 Joshua Harvey ，动画由 Artrake工作室制作。

The human eye can shift focus from a screen to the horizon in just a third of a second and detect everything from faint photons to blazing sunlight. Its evolution began with a simple light-sensitive spot in single-celled organisms over 500 million years ago. Through incremental changes—like the development of a lens and the support of the brain—these primitive structures became the complex eyes we have today. Even now, remnants of this stepwise evolution, like our inverted retina and blind spot, are visible in the human eye.