Within a fossil that is 530 million years old was a major discovery – the oldest eye in the world.
The eye comes from an extinct sea creature.
It is a primitive form of the compound eye, which is now found in crabs, bees and other modern animals.  The fossil was discovered in Estonia by researchers, including Professor Euan Clarkson of the University of Edinburgh.
Although the eye does not have a lens, Clarkson says it shows that the structure and function of compound eyes "has barely changed in half a billion years." "
Fossil and skeletal discoveries throughout history
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