The comment seems to have been made at least partly in jest, but Elon Musk has been very clear in the past that the dangers posed by artificial intelligence are no laughing matter.

So why not killer robots?

“And people wonder why I’m worried about the robocalypse…” Musk wrote in this Instagram post over the weekend. As you can see by the caption, he’s talking about a Tesla TSLA, +0.23% production line comprised of 542 robots, with 15 operating at the same time. Read more