Dinosaurs of the 21st Century: masters of the skyVideo | Updated 2 years ago Delivered by Dr Mikael Silversson Presented as part of the In the Wild West Lecture Series in 2012. They ruled the land for 170 million years and now they rule the skies! Explore the wonders of the dinosaur world, from the mighty T-rex to the humble duck. Chevron is a presenting partner of In the Wild West lecture series. View the discussion thread.