Chilean paleontologists last week presented their findings on a dinosaur with a highly unusual tail. It was discovered three years ago in Patagonia, and its tail has stumped researchers.

The Newsweek reported that this armored dinosaur likely measured around 20 feet long, and weighed roughly three tons. Its most striking feature was a powerful, club-like tail. This tail served as ...

Ankylosaurs were armored, herbivorous dinosaurs with a defensive tail club. The formation has also yielded one of the oldest stegosaurs. The findings indicate that this region was a hotspot for ...