Step 1 : Introduction to the question "What was the biggest dinosaur that ever lived?"
...The biggest dinosaurs in the world were titanosaurs. In fact, these prehistoric reptiles are the largest land-dwelling animals that have ever existed. Based on size estimates derived from a collection of fossilized bones attributed to the species, this colossal creature was estimated to have weighed around 77 tons and stretched approximately 122 feet long. In comparison, the Stegosaurus and Velociraptor were relatively small, standing just 2 to 3 feet tall, while the Triceratops reached up to 30 feet in length and weighed up to eight tons.