Scientists say that T-Rex might not be the cold-blooded killer we once thought as evidence suggests that dinosaurs like it might have been able to generate heat.Scientists say that T-Rex might not be the cold-blooded killer we once thought as evidence suggests that dinosaurs like it might have been able to generate heat. Scientists say that T-Rex might not be the cold-blooded killer we once thought as evidence suggests that dinosaurs like it might have been able to generate heat. Science & tech Articles | Mail Online