" So, Mulder,' Colton spoke in a mocking tone. 'What do you think? Look like the work of Little Green Men?'
'Gray,' Mulder said seriously.
'What?' Colton asked.
'Gray,' Mulder explained. You said green men. A Reticulan's skin tone is gray. They're known for their extraction of human livers due to a lack of iron in the Reticulian Galaxy.'
Colton looked confused- as though he couldn't tell whether Mulder was joking. 'You can't be serious,' he said.
'Do you know how much liver and onions go for on Reticulum?' Mulder asked Colton. "

― , Squeeze (The X-Files: Middle Grade, #4)