1.Duchenne de Bolougne 19th century French anatomist Two types of smiles:- The Duchenne smile, or thegenuine smile authenticated byspontaneous appearance of crowsfeet- The non-Duchenne smile, falsesmile, social smile or Pan-Am smile

2. Muscles used to smileDuchennesmile Non- Duchenne smile 3. Duchenne vs. non-Duchenne smile 4. KroisosKouros- The most famous exampleof the Archaic smile,from the 6th century BCE- On display in the NatlArcheological Museum,Athens, Greece 5. Mona Lisa (La Joconde)15th centuryby Leonardo da Vinci- One of the most mysterious,and famous smiles in artshistory- On display in the Louvre,Paris, France 6. Harvey Balls - The Smiley wascreated bySmiley Harvey Ball in 1963- One of the mostrecognizable smiles inpop culture- Ball never trademarkedhis creation; Bernardand Murray Spain didin the 1970s, adding the phrase have a nice day 7. Smilingis contagious 8. Humans are hard-wired to smile- British Obstetrician StuartCampbell has recordedbabies smiling in utero inthe 17th week- Campbell says it doesntmean babies have17 week oldbabydeveloped senses, but smiling inthat babies exhibit human uterobehaviors in the womb 9. Strong bonds: smiley baby & mommy- Mom-infant bond intensifies whenshe see her baby smile- The SMILE just by itself - just byseeing it - is a powerful socialreward,and its a social reward,especially for mothers who areinvested in helping that baby feelgood. - Dr. Ross Thompson,professor of psychology at theUniversity of California at Davis