A scientist has revealed that aliens are real.
Dr Boyd Bushman - who used to work at Area 51 - opened up about his career in studying UFOs and alien life at the secretive base in a documentary filmed just before he died.
"With respect to the alien craft, we have American citizens who are working on UFOs 24 hours a day.
"We are trying to learn what to do."
The former senior scientist describes that the aliens we know of can be split into two groups.
"There are two groups of aliens," describes. "They divide them into two groups. It’s like a cattle ranch.