Male and female research chimpanzees are reunited after being separated into samesex groups in the lab. Watch them meet one another and play together in a forest for the first time at the Project Chimps sanctuary in the Blue Ridge Mountains.

You can support the chimpanzees and help Project Chimps introduce more groups of male and female chimps by sponsoring a chimp or donating today at projectchimps.org

Still photos by Crystal Alba.