KB: We asked ourselves, "what obliquity, what misalignment would Planet Nine induce in the solar system?" because it must induce some. We know that Planet Nine's orbit in inclined. As a result, when Planet Nine torques the rest of the solar system, the two sort of act as two precessing tops.

(CNN) -- Around the world, fireflies light up the night with their shimmering bodies. But scientists say this magical display is under threat -- with the loss of their natural habitats, pesticide use and artificial light putting some of the 2,000 or so species at risk of extinction.