Do you know that when a clear vowel sound comes into your right ear, listener's voice is becoming harder; his pose is becoming straighter; and stress is going down. The same sound, coming into your left ear breaks rhythm and lowers a listener's attention? It's an interesting fact, that fleas can jump 130 times higher than their own height. In human terms this is equal to a 6ft. person jumping 780ft into the air. How do you think what is the most dangerous animal in the world? It's the common housefly. Because of their habits of visiting animal waste, they transmit more diseases than any other animal.