Who were the ancient Denisovans? Fossils reveal secrets about the mysterious humans

In 2008, a tiny fingertip rewrote human history when DNA sequencing revealed that it belonged to a previously unknown group of hominins: Denisovans. Further research revealed that they interbred with modern humans and were once widespread across Asia. In the past few years, more fossils have emerged that are helping to flesh out who Denisovans were and how exactly they fit into our family tree.