The Park Service said in a press release that the tiny, hornless deer lived in South Dakota about 32 million years ago, during the Oligocene Epoch. It belongs to an extinct family of deer that are ...

A study into a fossilized skull found at Badlands National Park, which eventually led to the novel findings, suggested that all of these deer were hornless and roughly the size of a modern ...

Four of the calves also inherited a bit of the plasmid that had ferried the hornless gene, called POLLED, into the bull’s genome. The unintended presence of foreign DNA has derailed their route to ...