We of course have no explanation for what happened here. Maybe someone does, but they're not around to ask right now.
This reminds me a lot of heaven and how God works. He makes all things new. He will be doing so continually in heaven, too.
That means there will always be things like this to make us go, "Huh. Wow, look at that. I wonder what that is." And then we get to learn, chase, and try to keep up with God (as if) forever.
Learning at the feet of the Master for eternity is going to be so cool. Do you know how to get to heaven?