Research shows that insects feel pain. A said don't think insects feel . He said insects know dangerous to stay away from. He said knew that insects sense 'pain' but didn't know an could make insects more .
The looked at fruit flies. They damaged leg on flies and let it heal. After it healed, the were more sensitive. The flies remembered the pain. They tried to protect legs. It was sensitive it died. The researcher wants to research pain. He wants to make to stop pain.
