Or, c) they interviewed a scientist doing the research and literally reported the fact:
> "We still don't know," he says. "I'm still kind of baffled."'
Scientists are baffled. It's what gets us out of bed. If we knew everything, we'd be called oracles or something. If we stuck to the comforts of the known, applicable facts, we'd be called engineers.
Humans are curious beings. We enjoy the trivia at the forefront of science, even if we won't read the boring details of the precise scientific answer. Mulling the questions that scientists are investigating is a delight. And yeah, sometimes it's a lazy editor who exploits that curiosity, editorializing without verification, but that doesn't seem to be the case here.