It's one of the most persistent problems in camouflage: how do you hide your eyes?

Skin is not that difficult to disguise. You can change its color, cover it up, match it to your environment. But eyes are tricky. You have to be able to see out of them. And unfortunately, predators are extremely good at looking for eyeballs.

I'm not a predator, but I am a marine biologist, which is kind of the same thing. I've done my time searching through plankton soup for squid larvae--and I can tell you the best way to search is to look for the eyes. They're just so recognizable!

Last month, an article that had caused something of a buzz in science circles since November was published in the journal Icarus.   John Matese and Daniel Whitmire, physicists at the University of Louisiana at Lafayette, wrote a paper(1) speculating about the existence of an unknown planet, a monstrous binary companion to our Sun bigger even than Jupiter.

The problem, other than the usual hype by places like Huffington Post along with mainstream media outlets, was this planet would have to be in the Öpik-Oort Cloud , which is itself a hypothesis.