3. July 2015, astronaut Scott Kelly tweeted a picture he had taken inside the ISS. In the upper right corner of the image, UFO enthusiasts claimed to have spotted an alien craft. In truth, this object was just an antenna that was part of the ship itself.
4. NASA decided that Kelly—who held the record for spending the most amount of time in space—was an ideal subject for research about space effect on human body. He helped NASA determine how space affects the human body, particularly because he has an identical twin living on Earth to serve as the control.