Sure people have made an underwater glue before but scientists at MIT have engineered proteins based on those found on mussels and barnacles (you know that crap that sticks to ships) to create a super glue that can stick to pretty much anything. This has the potential for things as vast as underwater ship repair and surgical adhesion.
Now for the most part animal based glue products including horses have gone away as more synthetic glues have become more prevalent. That did not stop the following conversation with my wife the other day.
Mrs. Bearman: Oh look there is some roadkill. Guess that keeps Gorilla Glue in business. (Gorilla Glue is headquartered near our house)
Mrs. Bearman: They use roadkill in their glue.
Bearman: WHAT?? Where the hell did you hear that?
Mrs. Bearman: I don’t know someone told me that.
Bearman: It probably was a bad game of telephone where someone joked about Gorilla Glue being made from real Gorilla and ultimately it gets turned into Gorilla Glue is made from roadkill. Oh yeah. I forgot, I saw the Gorilla Glue roadkill truck on patrol the other day.
Mrs. Bearman: Ok it does sound stupid now that you say it.