![](https://pbs.twimg.com/media/DXhED2EW4AASzK_.jpg)
![](https://pbs.twimg.com/media/DXhHQkIXcAA5uT2.jpg)
=> Le rire est un acte quotidien, si quotidien que nous ne prenons que
rarement le temps d'observer ce phénomène avec attention.
Quand rit-on ? Pourquoi ? A-t-on un seul type de rire ?
![](https://pbs.twimg.com/media/DXhJVeWX4AAPpnM.jpg)
![](https://pbs.twimg.com/media/DXhJ5jMW0AA-MZY.jpg)
Twitter may remove this content at anytime, convert it as a PDF, save and print for later use!
1) Follow Thread Reader App on Twitter so you can easily mention us!
2) Go to a Twitter thread (series of Tweets by the same owner) and mention us with a keyword "unroll"
@threadreaderapp unroll
You can practice here first or read more on our help page!