Collins took this photo of the Lunar Module, which had Buzz Aldrin and Neil Armstrong with Earth in the background, during the Apollo 11 mission. This makes him the only person ever who was not inside the frame of the photo. Matter can neither be created nor destroyed.
This means that every human being who has lived to the point of taking this picture exists in at least some form, and every human being born since then is also in this picture, at least in some form. So even if you were born after this picture, the material you are made of is still on this picture frame.
For his second and final mission in space, Collins served as the command module pilot for Apollo 11. While fellow astronauts Neil Armstrong and Buzz Aldrin made the first human landing on the lunar surface, Collins waited two and a half hours to board the module. , As the command module moved past the Moon, cutting off its communication with Earth, he wrote:
"This venture is structured for three men, and I consider my third as necessary as either of the other two. I do not mean to deny the feeling of solitude.