How tall was the sail on spinosaurus?Was spinosaurus bigger or smaller than tyrannosaurus rex?Where are the first spinosaurus fossils ever discovered?How many spinosaurus skeletons have ever been found?Learn the answer to these questions and many more fun facts in this 15-Minute Book. Spinosaurus was one of the strangest dinosaurs ever discovered. How much do you know about them?Ages 8 and up. This book is also included in the compilation 101 Fun Facts About Dinosaurs.LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Open the world of reading to a child by having them read for 15 minutes a day.