Many dino species 'undiscovered'
Up to 500 dinosaur groups may remain undiscovered, yet our knowledge of the creatures and how they were related is relatively complete, a scientist says. The figure of 500 may seem a lot, but this is a maximum possible value. The expert behind the study actually thinks the dinosaur fossil record is between one-half and two-thirds complete, which is comparatively good. The data comes from an analysis of more than 250 dinosaur groups and their family tree branches.
Interesting article, but I do wish the BBC would stop referring to dinosaurs as dinos.