MadSci Network: Evolution

Subject: why do people smile?

Date: Mon Feb 7 16:23:48 2000
Posted by Jenna Richman
Grade level: 7-9 School: White Hill
City: San Anselmo State/Province: California Country: USA
Area of science: Evolution
ID: 949962228.Ev

Why do we as humans smile when we are happy since no other animal does? How 
did we develop this instinct? why did only we develop it?

Re: why do people smile?

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