In%20today’s%20world%2C%20there%20are%20few%20animals%20that%20weigh%20in%20at%20a%20ton%20or%20more.%20But%20millions%20of%20years%20ago%2C%20massive%20creatures%20roamed%20the%20earth.%20This%20fascinating%20and%20educational%20coloring%20book%20focuses%20on%20the%20bigger%2C%20taller%2C%20and%20heavier%20mega%20dinosaurs%20that%20scientists%20are%20constantly%20bringing%20to%20light.%20Along%20with%20recently%20discovered%20species%2C%20it%20features%20old%20favorites%20like%20the%20mighty%20Tyrannosaurus%20rex.%20Each%20of%20the%2044%20illustrations%20includes%20descriptive%20captions%20plus%20a%20small%20silhouetted%20image%20of%20the%20dinosaur%20that%20compares%20its%20size%20to%20that%20of%20a%20human%20being.