ALT: snoopy is blowing a kiss with hearts flying around him .

ALT: a man with a mustache says change in front of a picture of the milky way

ALT: a woman ironing clothes with the words " very exciting stuff " behind her

ALT: a poster that says " protect haitian refugees " on a black background

Researchers from the National Institute of Environmental Health Sciences identified a compound that affects an area of the brain that triggers hormone production.

ALT: snoopy is sitting at a table with his eyes closed and his hand in his mouth .