Extremely rare worm fossil with internal organs found by scientists - BBC
- Extremely rare worm fossil with internal organs found by scientists BBC
- X-rays reveal half-billion-year-old insect ancestor BBC
- A 520 million-year-old perfectly preserved creature is set to reveal secrets of evolution The Independent
- Organ systems of a Cambrian euarthropod larva Nature.com
- 'My jaw just dropped': 500 million-year-old larva fossil found with brain preserved Livescience.com