Animal testing is something that goes on in most countries. Millions of animals are used for research purposes only, which means they spend all or most of their lives locked in a lab. The ex-lab chimps in the video below spent decades living in captivity, where they were often kept in isolation. After years of torture, the chimps are now able to enjoy freedom for the first time. Three of them were born in the research lab, so this was the first time they had ever come into contact with fresh air and sunlight. Their reaction is incredible!