In this Discovery short we get the answer to why we applaud, how did this behavior start in the first place. To be honest I've never really thought about why we applaud it's just so natural, but it was nice to get the explanation to why applauding is a natural to us and many other animal speeches.
As with allmost everything wikipedia have a very informative page about applause, so if this video made you curious about knowing more you have more to read.
