The sister ship of the Titanic, Gigantic (also known as Britannic), sunk on November 26, 1916 in the Aegean Sea. It is still debated today whether she was hit by a torpedo or if she struck a land...
because paper clips have the plastic bit around them and have air so they float on water. The effect you are talking about is known as surface tension. this has the effect of forming an elastic skin...