A NASA astronaut has claimed he once saw an "alien-like, organic object" floating outside his space shuttle.
Leland Melvin, 54, worked as an engineer on board Atlantis when he spotted the "translucent" item while orbiting Earth.
He wrote: “I have not seen [a UFO] in space or on the ground but thought I saw something organic/alien like floating out of the payload bay.
"Randy Bresnik and I called the ground to ask what it could be and it was ice that had broken off of the Freon hoses.
Melvin was then asked if he thought NASA had just told him that to keep him calm, he replied: “Hmm I don’t think so, but you never know."
"You never know." To read more, click here.