Toronto, Canada A new study in Canada has revealed that six-month old babies know when someone is teasing them and don't appreciate it.   Researchers at Toronto's York University examined six- and nine-month-old babies' reactions to a game in which an experimenter was either unable or unwilling to share a toy. They found the babies could tell and "calmly accepted" when an experimenter was unable to share the toy for reasons beyond his or her control. However, the babies averted their gazes and... Full Story