The Grammar Cop welcomes you back, dear friends… Come in and enjoy the frightful fruits of her labours!

1. “Their’s are living testimonies that we need not fall into the ‘holes at night.'”
2. “Quantum teleportation is a mysterious phenomena that can see information flung across space.”
3. “Unlike McDonald’s, Orange Julep does not need a big sign to advertize its whereabouts.”

The corrections:

1. How confused was this writer! Hi’s idea of spelling’s and punctuation’s is bizarre. Okay, there is really just one mistake here, but it’s a doozy. (Yes, doozy is a word. I looked it up!) There is no such word as “their’s”! It is an abominable excrescence best left at the bottom of a very dark, deep well, and – oh, sorry! Getting carried away. The point is: the intended word here is theirs. It is the plural form of their. Note that their is already a possessive form, so it is incorrect to add the ‘s to it. Now, as far as the “holes at night”? I have no idea!
2. “Phenomena” is plural! The singular is phenomenon. Use it here.
3. Evidently this writer (and I use the term loosely) does not know about using a spellchecker. It would’ve promptly singled out “advertize” as wrong, by underlining it in red. The word is spelled advertise.

Aaand the summer continues, with ever-terrible grubby gaffes. Join the Grammar Cop next week for another episode of Friday Follies!