Uber looking to buy Grubhub. Facebook buying Giphy. Apple nabbing NextVR.  Host Molly Wood speaks with Mark Lemley, who teaches antitrust and internet law at Stanford University, about whether regulators will take action against any of these deals. He says Facebook buying Giphy, for example, may not be any worse than its purchase of Instagram. But the combined weight of so many acquisitions could prompt regulators to wade in.