Neuralink, the Elon Musk-founded company developing an implant he’s described as “a Fitbit in your skull,” recently announced that it had gotten the go-ahead from the FDA to begin human clinical trials—and now, it has secured extra funding to see the studies through. The outfit raised $280 million in a recent venture capital round, according to a company announcement Monday that was posted, of course, on Musk’s X, the social media platform formerly known as Twitter.