What can you say about a really terrible mummy joke?

It Sphinx!
   Since Sphinx sounds very similar to "stinks" but is also an infamous mythical creature with the head of a human, body of a lion and sometimes wings of a bird that has a statue in Egypt, a country commonly associated with their ancient practice of mummification wherein deceased humans are preserved through a series of steps and buried in elaborate tombs. Therefore, since the joke is declared terrible and is a mummy joke, commonly associated with Egypt, "It Sphinx!" is a play on words that causes a slight amount of humor in its listeners.

Different authors may present facts in multiple ways as every author's way of interpretation vary.

Explanation:

Different authors have different techniques to present facts. Each author have their own uniques style of writing.

For instance, one author may present a sad story (with good storyline) using sad events, while other may use good events, such as old memories, to do so. In some cases, authors uses characters leading themselves to their fate, while in other cases other characters are used to bring them out of their fate.

As different authors vary in their style of writing so their way or presenting facts vary.