Several founders of hot startups took big payouts and let Mark Zuckerberg gobble up their companies—and came to regret it.

Dr. Oz, who now controls the Centers for Medicare and Medicaid Services and its $1.5 trillion budget, promoted the idea that AI avatars could replace frontline health care workers.

Donald Trump’s March 20 executive order aims to eliminate data silos. It could undermine privacy in the process.