The speed of sound under water is roughly 4,500 feet per second. Which is 5 times faster than the speed of sound that travels through the air!With this ratio whales are able to communicate over distances of hundreds of miles.
Superman started as a bald telepathic villain in the short story "The Reign Of Super-man" published in 1933. Less than six years later in 1938, Jerry Siegel and Joe Shuster sold their rights on Superman to Detective Comics(DC Comics) for $130.
In 1962 an laughing epidemic broke out in Tanganyika (now Tanzania). Starting among a group of schoolgirls, the laughter spread rapidly, eventually infecting neighbouring villages and forcing schools to close. It lasted for at least six months.
Lips are fuller in younger people because of collagen. When you get older there's not much collagen produced and so in turn it breaks down a bit. In a way it deflates like a balloon. Of course this does vary from person to person.