In his later years, the Roman army invaded Syracuse, and Archimedes instructed his compatriots to make many combat weapons for attack and defense. When Marcelle Sai, the leader of the invading army, led a group of people to attack the city, he designed a trebuchet to beat the enemy out of the water. The iron claw crane he made can lift and reverse enemy ships. ...

Another incredible legend is that he led the Syracuse people to hold the concave mirror, focused the sunlight on the wooden warships of the Roman army, and set them on fire. Roman soldiers have been frightened by such frequent blows. They are afraid of everything. As soon as they saw the rope or wood thrown from the city, they exclaimed "Archimedes is coming" and then ran around.

Roman troops were kept out of the city for three years. Finally, in 2 12 BC, the Romans took advantage of the slight relaxation of the defense of the ancient city of Sila to attack on a large scale. At this time, 75-year-old Archimedes was studying an abstruse math problem. A Roman soldier broke in and trampled on his painting with his foot. Archimedes argued with him angrily. The cruel and ignorant soldier raised his knife and a talented science superstar fell.