Jan Moor-Jankowski (easy version)

Dr Jan Moor-Jankowski grew up in Poland in the years before the Second World War. Jan spent the war fighting the Germans. He was hurt several times.

After the war, Jan went to Switzerland and studied to become a doctor. Later, after he had finished his studies, he went to England and worked there as a scientist. He was interested in monkeys and began doing experiments on them. In one of these experiments, he injected monkey cells into his own blood even though he knew this was dangerous. When his friends found out he was doing something so dangerous, they were worried. They told Jan that he could find a prison in the United States where he would be allowed to inject monkey cells into prisoners.

Jan was surprised and troubled by his friends' idea. He couldn't stop thinking about it. He lay awake at night thinking about how he would feel if someone did experiments on him even though he didn't want them to. He knew it was wrong to use prisoners in experiments without their agreement. And, while he was thinking about that, he also began thinking about whether it was all right to use monkeys in scientific research. He was quite sure that monkeys had feelings similar to humans' feelings.

After thinking about all these things for a long time, Jan decided that it was all right to do experiments on monkeys and even on apes but only if they were treated very kindly. Their cages should always be kept clean and they should have bars on all sides so they could all see each other.They should not be used for testing make-up or poisons because this was cruel. And it was also wrong to allow monkeys to die after they had been used in experiments, as was often done.

After his time in London, Jan moved to the United States. There he worked in a laboratory at New York University. He did research on human blood diseases. He used monkeys in his experiments, but he always treated them well.

By the 1990s there were many strong animal rights groups in the United States. People who belonged to these groups believed it was wrong to use animals for any purpose — for food, clothing, or scientific research. These people thought Jan was wrong to be using animals in his research, but they liked him anyway because he treated animals better than other researchers.

One day in 1996, Jan got a phone call from an animal rights group. They said they were angry because they had heard that Jan was doing cruel experiments on monkeys. As Jan listened to them, he realized that there had been a mistake. He realized that the people on the phone were talking about an experiment that was being done at New York University, but in another scientist's laboratory.

animals such as a chimpanzees or gorillas — like monkeys in many ways but more intelligent and without tails

an illegal drug made from cocoa leaves.

correct scientific method of finding the truth

take chances:
do something that might have a bad result; take risks