Scanned.


The earliest known complete nervous system preserved in the fossilised remains of a creature that crawled and swam in the ocean 520 million years ago has been discovered.

Scientists believe it shows the moment the ancestors of spiders and scorpions evolved from other insects and demonstrates how spiders' biting mouth parts evolved from its ancestor's appendages.


The creature is an ancestor of chelicerates which branched off from the family tree of other arthropods, including insects, crustaceans and millipedes.



much more: http://www.dailymail.co.uk/sciencete...#ixzz2hvis5vGY