This clip is taken from Walking with Dinosaurs (1999) Volcanoes erupt, Pterosaurs vanish and a mother Tyrannosaurus risks everything to protect her eggs. Discover how these prehistoric giants battled extinction in a changing world. Subscribe: bit.ly/BBCEarthSub #WalkingWithDinosaurs #Pterosaurs #Tyrannosaurus Watch more: Best of BBC Earth 🌍 bit.ly/BestOfBBCEarth Best Animal Fights 🥊 bit.ly/BestAnimalFights Videos over 10 minutes ⏰ bit.ly/3SHJCEJ Planet Earth III 🌍 bit.ly/PlanetEarthIIIPlaylist Frozen Planet II ❄️ https:/bit.ly/FrozenPlanetIIPlaylist Blue Planet II in 4k 🌊 bit.ly/BluePlanetII4kPlaylist Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of entertaining and thought-provoking natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this. This is a commercial page from BBC Studios. Service information a...