Deep within a fossil-rich site in China, scientists have uncovered clues from one of the most mysterious periods in Earth’s history. Yet it’s a hidden feature that’s drawing the most attention from researchers. A newly described fossil species from China is offering a rare glimpse into life just after the largest extinction in Earth’s history. Preserved with unusual detail, the fossils reveal powerful jaws in a group long known mostly from shells. The speci... [3298 chars]