― Palaeontologists has discovered more than one thousand species of dinosaurs to date. However, there are 10 species that you should know, lest you be accused of falling behind the prehistoric times. ∙ 1. Tyrannosaurus Rex ∙ The undisputed king of the dinosaurs, Tyrannosaurus Rex is immensely popular thanks to a fawning press, countless starring roles in movies and TV shows, and, let's not forget, a really cool name (which is Greek for "tyrant lizard king"). ∙ 2. Velociraptor [...].