Hackers have stolen some $600 million in cryptocurrency from the decentralized finance platform Poly Network, in what it says is the largest theft in the industry’s history. Following the hack, Poly Network established several addresses to which it said the attacker could return the money. And it appears the hacker is cooperating: As of 7:47 a.m. ET Wednesday, Poly Network said, it had received about $4.7 million back. It was not immediately clear who was behind the hack or why the money is being returned. Tap the link in our bio to learn more.