These days, the latest meme that's flooding Twitter, Imgur, Tumblr, and Facebook feeds is "Primitive Sponge" — a prehistoric ancestor of Spongebob Squarepants. According to the Spongebob ...

The episode goes through the different eras of Bikini Bottom, such as prehistoric and pioneer. All the eras shown reference previous episodes including “SpongeBob B.C. (Before Comedy)” and “ ...