X-rays reveal tiny half-billion-year-old creature

The internal anatomy of a prehistoric creature the size of a poppy seed has been revealed in “astonishing detail”. Researchers used powerful X-rays to scan the 520-million-year-old fossil. The results, published in the journal Nature, reveal its microscopic blood vessels and nervous system. It is a peek inside the body of one of the earliest ancestors of modern insects, spiders and crabs. ...