As if Pluto and its moons weren’t unique enough, scientists at the SETI Institute say if tiny Hydra were spinning much faster its surface would fly off. The fact that most of Pluto’s moons -- Styx, Nix, Kerberos, and Hydra -- are spinning wildly anyway is an anomaly. So when NASA’s New Horizon’s space probe got close enough to make some observations about the spin rates of Pluto’s known satellites, what was found surprised a few folks. One moon, Nix, is tilted on its axis and spinning backwards. The outermost moon, Hydra, is spinning like a top, rotating 89 times every time it circles the dwarf planet. “If Hydra were spinning much faster, material would fly off its surface due to the centrifugal force,” NASA said.