Back in January, Grimes announced her pregnancy on social media with a series of very Grimes photos that superimposed a digitally enhanced depiction of an embryo. From that point forward, fans have had a ball online speculating what the child of billionaire tech guy Elon Musk and an artist fascinated with the post apocalyptic world would be. But now, no one has to guess anymore. Last night, Musk took to Twitter to announce that they had welcomed a baby boy into the world by the name of X Æ A-12. He also dropped some photos on the timeline that placed a tattooed face filer on the young lad. Still no news on how to pronounce his name, though.