sign language...
sign language is underrated... it should be a basic signature in school... if all public schools around the world taught it... we could not only communicate with other people that cannot talk or hear... but we could actually communicate with anyone anywhere in the world... no matter what country they are from and god they pray... think about it... you could go to any country and understand people... just imagine... being able to express yourself far away from home... we could use sign languages in quiet places... send messages in loud environements... i can't really think of any negative side from learning it... i mean... we all sort of use some basic signs... we already pretty much know all the insults... even if technology is catching up very fast with languages and soon enough we will be able to travel abroad and pretty much fluently understand and talk through our cell phone... or whatever the new device name will be... sign language remains the only real international language and intercultural best means to communicate... each one of us just have to learn it... as simple as that...