Settle down, Sheldon. It's a typo.
Actually it's more than a typo, it's a common pitfall, part of the reason that so much science news is misreported and misunderstood. Too many reporters or commentators tend to take a single scientist's assertions and attribute it to "scientists" in general -- or even worse, to claim that "scientists say" something without giving specific attribution at all. It's the same kind of sloppy thinking that this particular scientist is guilty of in the first place, and it's part of how bad or misleading ideas get propagated farther than they should. (This point came up in
an article I read just recently about how to read science news critically, which is why it was on my mind.) So it's worthwhile to notice and call attention to such things, as part of basic defensive reading habits.