来自MSN2 个月
500-million-year-old worm fossil traces origins of insects and arachnids
A team of researchers has identified the earliest known ecdysozoan fossil, which originated from the Precambrian era, the Ediacaran Period. The fossil is of a small, worm-like creature named Uncus ...
University of Manchester7 年
Half-a-billion year old worm fossils shed new light on animal evolution
The fossils found date back to a geological and evolutionary period known as the Ediacaran–Cambrian transition. This was when the Ediacaran Period, which spanned 94 million years from the end of the ...