"There are still a lot of corals, genetic diversity is still pretty considerable,” Matz says. His model, and the extra decades of wiggle room it suggests, to him means we should be fighting twice as hard to reduce emissions and get climate change under control while we still can. "I’ve seen claims that corals are dying, that’s it, bye bye,” he says. If that’s the case, he says, it would be too late to do anything. Instead, he sees hope—for now. “If we don’t do anything, it will get desperate. There’s still time for us to come to our senses."