四、阅读下面的短文并用英语回答问题
In 1991, some hikers (徒步旅行者) in the Italian Alps (阿尔卑斯山) found a dead body. The body was partly frozen in the ice and when scientists examined it, they discovered something amazing. The man died over 5 300 years ago! He is now known as the Iceman and is the oldest complete human mummy (木乃伊) on Earth.
Who was the Iceman and why did he die by himself in the snow? Scientists are asking themselves these questions and are now slowly putting together the clues to solve the mystery.
Scientists studied his body and learned many things. His teeth and skull showed that he was probably in his 40s. Among his weapons was a copper (铜) axe, which shows that he was wealthy. He also had 57 tattoos (文身) on his body. By examining the food he had eaten, scientists have even managed to work out exactly where he lived in Italy!
There have been many different stories about the Iceman's death. Scientists at first thought that the cause of his death was probably the extreme (极端的) cold. In 2001, however, a new cause of his death was discovered. An X - ray examination of the body showed a small dark shape in the Iceman's left shoulder. It showed that the stone head of an arrow (箭) caused the injury (伤害) that killed him. Now there was suddenly a new idea that the Iceman was the victim of a murder!
In 2003, an Australian scientist discovered the blood of four different people on the Iceman's clothes. This tells us that he was probably trying to protect himself in a fight before he was murdered. This could also explain the injuries he had on his hand and head. Some scientists think that the Iceman's murder was the end of a fight for power among his people, but not everyone agrees.
The case of the Iceman hasn't been closed yet and the studies will continue. Through the story of this ancient human, we will continue to learn more about his life and our history.
1. Where was the Iceman found?
2. How old was the Iceman when he died?
3. What caused the victim's death according to the discovery in 2001?