Neuron Remains of 520 Million Years Ago

Many people think cells cannot be preserved for a long time. However, the following news story report about neuron remains of 520 million years ago: [link to www.newscientist.com (secure)]

Interesting quote from the news:
"It’s the most ancient nervous system we’ve ever seen, preserved inside 520 million-year-old fossils. What’s more, the nervous systems of these creatures’ modern-day descendants are less intricate, proving that evolution isn’t a one-way street to complexity.

Read more: [link to www.newscientist.com (secure)]