Haroun Tazieff, the Polish has spent his active and deep caves in all parts of the world. In 1948, he went to Lake Kivu in the Congo to observe a new volcano which he later named Kituro. Tazieff was able to set up his camp very close to the volcano while it was Though he managed to take a number of he could not stay near the volcano for very long. He noticed that a river of liquid rock was coming towards him. It to him but Tazieff managed to escape just in time. He waited until the volcano became quiet and he was able to return two days later. This time, he managed to climb into the mouth of Kituro so that he could take and measure Tazieff has often risked his life in this way. He has been able to tell us more about active than any man alive.