I always hate headlines about "scientists are baffled". The goal is to (correctly) point out how extraordinary this is, but it implies that they are completely out of ideas. They rarely are.<p>Instead, they have an incomplete understanding, and ideas about how to make their understanding more complete. "Baffled" connotes that they can't proceed, and absolutely they can, and are.<p>That's nitpicking at words, and headlines are always notoriously bad about it. But it's really doing a disservice to the serious science in the article: an extraordinary event with a range of possible causes, all of them pointing to the fact that additional CO2 in the atmosphere is very, very bad.