I've discussed the Gambler's Fallacy in the past (eg if you flip nine heads in a row, what are the odds the next toss will be a tail?). The inverse is another matter. Wiki gives this example:
Suppose a man walked into a room and saw someone rolling a pair of dice. Furthermore, imagine that the result of this dice roll is a double-six. The man entering the room would commit the Inverse Gambler's Fallacy if he said, "You've probably been rolling the dice for quite a while, since it's unlikely you would get a double-six on your first attempt."
The point is that unlikely things happen all the time. Here, it's discussed in terms of the recent discovery of the largest structure in the universe.