ADVERTISEMENT
  About the SA Blog Network

Posts Tagged "bilateria"

Thoughtomics

Animal vision evolved 700 million years ago

All animal eyes and eye-spots contain opsin, a protein that captures light. This is the compound eye of the Antarctic krill. Photo by Gerd Alberti and Uwe Kills

Gaze deep into any animal eye and you will find opsin, the protein through which we see the world. Every ray of light that you perceive was caught by an opsin first. Without opsin there would be no blue, no red, no green. The entire visible spectrum would be.. just another spectrum. But opsins haven’t [...]

Keep reading »

More from Scientific American

Scientific American Special Universe

Get the latest Special Collector's edition

Secrets of the Universe: Past, Present, Future

Order Now >

X

Email this Article

X